Originally Posted by Tracey2528
Once you finish the cake, you'll understand why the quotes were outrageous
I totally agree with Tracey2528. Although your heart is in the right place, you may find it just a tad past "daunting" and more toward "impossible". When experienced, custom cake decorators tell you, "I'm not able to do that", there's a reason. You may wish to arrive at a significant compromise for your daughter's birthday cake.
I live in a huge metropolitan area with many fabulous, custom bakers who actually could create that cake, exactly as shown......for a price. In my area a cake like that would probably cost about $1000 to $1200 or more.
As previously stated, it's not actually impossible and you may pull it off, but be prepared for a significant learning curve.