I primarily print with ABS, I do have a heated bed and when I do print in pla, ive never had an issue with the adhesive of the tape, I normally run the bed at 50-60*C With abs, I find using kapton tape with a layer of white Elmer’s glue from a glue stick does the job
Wouldn’t you be best off just heating it with electric underfloor heating? That way you get separate electronics and heat controller, its really cheap and you can just use a levelling compound over the top and some cheap IKEA mirror tiles. Think bathrooms more than 3d printers for really super massive size
