Please help me build a rack

Alright I have 8 females, and 3 males. I am wanting to build a rack. What is the smallest tub I can use for an adult gecko? And then come breeding season next year how do I breed. Should my males be in larger tub. And then my next goal is a hatchling rack. I want to keep them in clutches. They will all be females. What size tubs should they be kept in? As far as tubs, what do you use as a liner? What is the best type of wood? What do you recommend for heat tape and a thermostate? And how do I wire that and everything? And then as far as winter how do I keep it warm. Will the tape be enough. At night right now my room is 75 degrees. Is that okay? Thanks for all the help. I have read alot of sites but I need help like being walked threw it, and I have so many questions and sites can't answer it.

Generally one adult is fine in 15-16qt tub. I like the 18qt tubs, a little more room. I use paper towels in tubs. As far as heating it, I personally use and reccomend repti heat cable, so much easier then heat tape, dont have to wire it or anything.