IJ Carpet Python Enclosure Requirements

[Mas0n]

Hi there!
I currently work for a Science Centre in Northern Ontario Canada. We have quite a few reptiles already and someone wants to donate a IJ Carpet Python to us. I have a tank right now thats 4 Feet Long, 21 Inches Tall and 12 Inches wide. I understand Carpets are semi aboral so this tank is tall enough that i could have some climbing in there, but i'm worried its not wide enough. Would this tank suffice? How about when its full grown? (Just want to ensure we have the proper equipment to care for the guy) Also we have a Ball Python already that i get frozen rats shipped in and then i thaw and feed. Apparently this Carpet Python has only ever been fed live. Any suggestions for feeding frozen thawed?

I will also be getting a heating pad but will i need a light as well?

Thank you so much! Any additional advise is also appreciated.