Also make sure there's a good reptile vet in your area - just in case.
Since you haven't bought equipment yet save up for a proper reptile enclosure rather than a tank, as it will be a lot easier to maintain temps and humidity in them. Companies like Animal Plastics, C-Serpents, Herptastic, etc. have good offerings. Sometimes you can find used ones on Craigslist or your local Facebook reptile forums - just remember to clean and disinfect them very well.
Also you will need a thermostat for your under-tank heater to ensure it doesn't overheat, as well as a heat gun or IR thermometer to measure surface temperatures in the enclosure.