I need some advice on what frogs get along with Red eye tree frogs.

I have a 100gall tank/cage that will be made into a nice tropical cage for the frogs..But of course i will be adding more frogs.For now my red eyes are babies,so i wouldnt put them in the 100gal or else I wouldnt find them for sure! anyways i have a few questions;

(1 Would it be okay for a Green Tree frog to live with RETF's?
(2 Any suggestions on some friendly(in-expensive?) frogs to be in the same cage?
(3 Any advice on this big terrarium project?[probably wont happen right now..maybe a few months]