How to best heat my enclosure?

[Homebody]

Alright, I'll experiment with just the DHP first.

I was trying to predict if I would need 2 heat sources mainly because that way I'd buy a multichannel thermostat instead of buying a normal thermostat, then realizing I'd need a 2nd heat source, and having to buy another one. The price would be nearly the same and the multichannel one has more features, but at the same time if I only end up needing the DHP then I'd be wasting money by buying it.

Another question tho, in case the DHP isn't enough, would the CHE be put on the colder side?

Yes. The CHE would go on the cool side to maintain the cool side temps between 24-27C. I think it's very likely that you will need the CHE, so I would go ahead and get the thermostat capable of regulating two heat sources.

Also, you should wait a bit before buying anything to see if anyone else on the forum has a different opinion. It's still early morning in the U.S., so most of our members haven't checked in yet.