Wow, that is ALOT of cake!! But I think you could do it!! But like others said...will take some planning and space (to store all that cake & icing)!!
and be very nice to all your friends b/c you'll need some help!!
but if you think you can do it....go for it!! it is def. a cool opportunity...I'd have a hard time saying no. plus you got all us CC folks to help keep your sanity!!
as for the pricing.....um...good luck!! no... just kidding!! I'd call and ask what their budget is and then go from there.
when do they need this cake?? how much time you got to make this work??