Get it in a bigger tank. If you can't afford a bigger tank, get a sterilite tub with holes in it for humidity- much cheaper. Put down proper bedding. Water bowl. Hides- you don't even have to buy them; there are creative ways to make them. **UNDER THE TANK HEATER**. Air temps are NOT enough! You should have a hot spot of 90-92 degrees, and a coll area of about 85 or so... And to go with the UTH, you need something to regulate temperature. A decent affordable option is the Hydrofarm one; 30 or 40 bucks...
That environment is not acceptable for that snake though.. period. :/ Also, I'd suggest rat fuzzies or mice hoppers.