Thank you everyone for your responses! I'll try to be a little less lengthy, xD

I appreciate all the advice, and I'm glad Nick Mutton is an approachable guy. Thank you for pointing out that enclosure to me Homebody- I'm definitely interested! That looks like it would work about perfect.

My one concern is that when looking into RHPs already this week, I found out that they're sold out... well... literally, pretty much everywhere. And if they werent sold out, a long wait was mentioned. Would a 100w CHE set on top work until I could get my hands on an RHP? Also, for an UTH, what size of Heat Tape would be recommended for a 36x18? 12"×12" or 21"×12"?