However, my response was about your new house. You cannot make that room a habitat in the winter.
Ask your builder if he will warranty damage from over humidifying the room. I don't think so.
Build a proper enclosure where you can easily control humidity, UV and basking for 2 or 3 months.
I will add a short CV.
I restored my Victorian home in Oak Park, IL myself and it took 20 years. At that time I also helped with the restoration of the Frank Lloyd Wright home and studio. A much colder climate than you deal with.
CapmBob is a valued and respected of this community and does incredible work on everything he creates, IMO.