I am making my first 2 tier cake. It is for 65 people and they are looking at a 14 inch cake (which I was going to make 2 layers) and a 10 inch
(again making 2 layers) I do plan on leveling the cakes off so they will not be that high. According to most websites I should have a ton of cake, but it is what they are asking for.

I am going to make paula deens red velvet in the 10" and chocolate in the 14" but I dont know how long to cook the cakes, any suggestions? I never worked with a 3 inch pan before.

I'd start it at an hour at 325F, with a few flower nails in the 14" and one in the 10" after that check with a toothpick to ensure it's done.

Honestly, you just bake it until it's done. We don't know if your oven runs slow or hot, whether you're baking in electric or gas, conventional or convection. It all makes a difference. You don't ever bake by time; you bake by doneness.