Heh... Good for you. My husband is OK with me getting more snakes, gradually, but HE doesn't initiate purchasing one.
Did you try a sauna for the bad shed?
Also, if you do get a UTH, make sure you hook it up to a dimmer and have a thermometer monitoring it... Some of the ones in stores can get really hot, hot enough to burn your snake if it is not controlled properly.
Just a suggestion, but if you think it's likely that you'll get a few more balls, you might not want to spend too much on this setup (other than necessary heat,etc.) and invest in a rack system before you get another snake. I am going to be getting my first rack soon and wish I had done so earlier. AP (animal plastics) and cserpents make good racks.
A rack will allow you to run several tubs off of a single thermometer channel / probe, so more efficient and more space-saving than having tanks everywhere. Works best if you're keeping multiple animals of the same species or that need the same temp requirements.