Forrest I can list at least 10 reasons right off the top of my head that your idea won't work.
Just a couple quickies
You can't control the water, food and humidity in a room that size.
Your chams will find each other, count of a gravid female veiled in no time flat.
There are a lot of things in that room that are a hazard to your chams. I have a bedroom all for 1 cham, i do know what I am saying here.
Biggest reason, you are very new to chams and would not know if you had a problem until it was too late, stress, dehydration,fighting are all things that can kill a cham or chams.
sorry, I am not trying to be mean. Also Jann does her free ranges in a very controlled way. Each cham has a small tree and it is set up so the cham can not leave the tree. That is doing it safely, but the chams have less room than the chams I keep in cages. It is all a toss up.