You only have one snake, right? You have heat & t-stat for what he's living in now, right? It would be most convenient & helpful IF you had extra equipment to set up another enclosure first, so you can completely test it for a few days (MINIMUM) before moving your snake into it, but I suppose it's going to depend on how prepared (ahead of time) & how skilled at installing things you are too? It's a good idea to have spare heat etc. on hand anyway, because if or when something fails, it takes a while to get a replacement, so I'd advise doing that- getting the extra equipment.