I made a foolish promise to one of my best girlfriends that I would make her wedding cake. The wedding is in one week and I have nothing done. I've never done a wedding cake before. My husband is basically non-existent to help me with our 3 year old daughter. I also work full time days. What do I do?! Can I pull off a 3 tier cake plus a small grooms cake?! I just need some advice, should I try it or tell her I can't do this? 
First bake the cakes and freeze them.
Then decide how you're gonna decorate and ice them.
What is your design ?
Make the flowers if you're gonna add alot of flowers.
Fresh flowers would take away a lot of stress from you. Good luck.. 
Does your husband even know he has a child ?
if you dont have time to make it, go buy your local grocery store and see if you can buy their ready made cake. they usually sell them for less if you get them uniced. then all you have to do it decorate and assemble it. Dont try and do anything fancy, just made be a simple ribbon and fresh flowers. the grooms cake you can also buy, just use some ganache and strawberries/raspberries and chocolate shavings to garnish. Everything should look like you spent hours working on it, when really you took a few shortcuts here and there. hopw everything works out.
i would recommend doing something really simple and doing it all in stages. sit down and plan everything out...
bake one night after your daughter is in bed - decide your sizes, mix your batter and bake. wrap your tiers in plastic wrap and put in the freezer.
make icing one day - decide whether you'll do BC or fondant (i'd say to decrease stress, do BC), and the colors, mix it all up and put in tupperware containers and refrigerate.
take one day to prepare cake boards, decorations and accessories (get your topper ready, order/make flowers, etc.).
ice and assemble all in one day. you can decorate the following day.
if you have a plan, you'll be okay... do it in manageable stages... get a friend, a neighbour, your husband, a family member to help if you need it.
and most of all GOOD LUCK!!! 
I made a foolish promise to one of my best girlfriends that I would make her wedding cake. The wedding is in one week and I have nothing done. I've never done a wedding cake before. My husband is basically non-existent to help me with our 3 year old daughter. I also work full time days. What do I do?! Can I pull off a 3 tier cake plus a small grooms cake?! I just need some advice, should I try it or tell her I can't do this?
At this late date, you can't tell her you can't do it 
I agree with the above posters; write down your plan and do something every day. Keep the design simple. GOOD LUCK
Why don't you bake your cakes starting on tomorrow, wrap and freeze. On Monday, start making your icing. I would suggest that you make at least three (3) double batches if you have a kitchen aid mixer or six single batches, store in sealed container and refrigerate. Do you know what type of stand you plan to use? If not, what about 2 foam boards glued together with a piece of satin fabric gathered towards the middle to compliment the wedding colors. Swiss dots are always quick and easy to make and you can make it all in ivory or white and use coordinating silk flowers to accent the cake. As far as a topper, why don't you call the bride and ask her if she already has one in mind or would she like for you to use silk flowers. Do a simple border or ribbon and you are finished. Do you have any experience with torting and leveling? If not, make sure you buy a small leveler to make sure that your cakes are level. So, this is the plan:
Sunday: Bake cakes, wrap securely and freeze;
Monday: Make at least 6 single batches or 3 double batches of buttercream
Tuesday: If you are using any fondant/gumpaste accents, begin making them so that there is enough drying time.
Wednesday: Spend your lunch hour picking up any silk flowers/ribbons that you may plan to use as well as your cake base.
Thursday: Prepare your base, ice all the cakes and store in boxes in the fridge wrapped in saran wrap to seal in the freshness without messing up your icing. Don't forget to dowel your two bottom layers for stability.
Friday: Decorate each layer if you plan on using fondant accents or any type of piping. You should probably stack the layers on site early Saturday morning, add borders, flowers, ribbon, etc. Make sure you take extra icing with bags, tips, etc. a spatula, viva paper towels if you are using a crusting buttercream.
Wedding cakes are very stressful so make sure that you give yourself plenty of time on Saturday to set up. Do not and I repeat do not, go to bed Friday night without the cake being completely done with the exception of stacking and adding a border. You will not have enough time Saturday no matter how you think you have it timed out. Some people may disagree with me but I've been in that position with a baby shower cake and I can say that it was the one cake that I've done that I was not at all pleased with.
I can't offer advice, but I wish you luck! You can totally do this. I haven't done a wedding cake yet but reading all of the posts so far that break it down for you make it seem totally manageable. Follow their advice and you'll be fine. I'm anxious to hear what design you had in mind and I can't wait to read your post after next weekend titled, "I DID IT!"
Just remembering a wedding photo job years ago where the grandmother didn't start decorating the cake AT ALL until the grandaughter started getting ready!
While the ceremony was going on there she was frantically putting it all together in the kitchen!
It looked pretty pitiful.
White with country blue roses.
I tried my best to take a pretty picture LOL.
Oh well, they were some hayseed types.
On the "buffet" table was baloney, square cheese in plastic wrappers, french's mustard bottle and white bread still in a perfect stack just the way it came out of the wonder bread sack!
The groom's name was, I'm NOT kidding, Angus.
He was a Huge!
Funny memories.
mandytagg,
You can totally do this.
You've been given some wonderful advice and great plan of action.
For my $.02, I'd add that if you do make the cakes yourself, use a mix - it'll be way faster with almost guaranteed results.
Also, if you use buttercream - try Melvira's trick:
http://www.cakecentral.com/cake-decorating-ftopict-47753-melvira.html
How to:
http://tinyurl.com/yjgj9x
http://tinyurl.com/yaynuv
http://tinyurl.com/y2kcl8
HTH
You can do this. Just keep it very simple some times simple are the most beautiful cakes good luck
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