My nephew and his bride to be are marrying in Florida. So, for their wedding shower, they want a starfish cake to feed 50-60, but then they said there shouldn't be more than 70 there.....

So, I need some advice on how to prepare for the cutting, assembling, etc. for this.

They'd like it textured and I'm pretty sure I can do that with ease, but if anyone has any pointers, please share.

Also, I'm really not sure what to charge them for this, with so much work involved.

TIA!!!!!!!