Again, thanks for the advice.

OK, so what I'm going to try is a dual device thermostat (Inkbird ITC-608T), one output to control the UTH and one to control a CHE. Right now, the thermostats I can afford are On/Off as opposed to adaptive. Do you see this as being a problem with a CHE? My understanding of CHE is that they take a while to warm up and cool down, so if it's cycling on and the temperature hits the high end, it will shut off but continue to radiate heat a while, once it's cool, the temperatures are going to slowly creep back down at which point it will kick on again but will take some time to come back up to temperature. To me, that yo-yo of heat seems problematic, and moreso because of the CHE, but I'm not sure how to get around it without a significantly more expensive thermostat that can modulate at the wattage level rather than simply On/Off (and certainly if you know of a thermostat that modulates wattage that's less expensive than a herpstat, I'm all ears!)