I have my adult female ball python in a 40 gallon glass viv. It has worked well for me, but I am daydreaming about having her in a bin, as I am currently having temp/humidity issues right now, and a bin would help a lot.

What size (dimensions) bin would you suggest for my girl? She's about 3'10". She will also need to be fed in the bin. And will one heat pad (it's kind of big) be enough to heat the whole enclosure or will I need to invest in some other heating method?