Don't like UTHs? They prefer the RHPs? Or what?
I have a oil filled heater for my main heat source in my snake room but each cage does have either a over head heat bulb, RHP, or UTH for a hotspot. I have some very nice ProProducts RHPs in my large cages but hardly ever run them as I just don't need to. Even during the bad freeze we had last year I didn't turn them on and everything was good. Once you get to a larger number having a designated room with a main heater is much easier to work.