Since you are starting with nothing I would strongly suggest getting a tub from the beginning. Tubs like this with the handles that lock the lid securely in place are ideal:
https://www.lowes.com/pd/Hefty-34-Qu...ng-Lid/3341162

Add a thermostat regulating an under-tank heater under one side of the tub, two hides, and a water bowl, and you have a safe, secure basic setup for a lot less than the snake kit offered by retail stores. You can use newspaper as substrate.