Well, see how it works for you I guess, since you are certainly committed to your theory of approach to this.
Just bear in mind that heating a coop often makes it DAMPER (more humid). Far less moisture comes off frozen poo than off thawed poo; and also warmer air holds more moisture with the result that if there are ANY cold surfaces/areas you get more condensation (which makes it hard to get the humidity out of the air, even by ventilation). I am particularly concerned since, as I've said in earlier threads, that's not a lot of ventilation there.
It might work for you, of course... just be aware it's not the highest-percentage type approach and so it is good that you will be keeping a close eye on things.
"Flock mistress" is btw a generic member title that the computer automatically applies when you have exceeded a certain number of posts. It is not something a person *chooses* to have under their name.
Pat