Ok I'll try in outline in more detail below. This is my 'equipment' list:
How everything fits together:
Overall, I generally check my neos once a week to see how they're fairing, but I've had this set up for 3/4 a year and they seem to be happy. Lots and lots and lots of root growth! Another important note is that most of my neos are potted in terracotta with long strand coconut fiber since the humidity is so high in this little greenhouse. If your plants are in moss, I'd be careful about how much you water them!
In any case, hopefully this helps!
I use this https://www.amazon.com/AmazonBasics-500-Watt-Ceramic-Personal-Heater/dp/B074MX8VN5/?_encoding=UTF8&pd_rd_w=TuuT7&content-id=amzn1.sym.bc5f3394-3b4c-4031-8ac0-18107ac75816&pf_rd_p=bc5f3394-3b4c-4031-8ac0-18107ac75816&pf_rd_r=5VWW3PE93H0BYY8JZCZ6&pd_rd_wg=iH8lg&pd_rd_r=588b0e75-a2f2-46da-9760-2543accaea5a&ref_=pd_gw_ci_mcx_mr_hp_atf_m 500W one from Amazon. You will also need an Inkbird controller (or equivalent) to turn the heater on and off.