This is my first snake and if it becomes and addiction LOL then it will be racks for the rest with this being my display cage. I didn't want to chance getting bugs or anything from hardware store cypress so I didn't really look around. The big bag was $28 but I still have 1/4 left for spot cleaning. I spend $30 on worse things during a month I am sure. I stopped drinking coffee at coffee shops (no more Timmies) so that covers my substrate expense LOL. With the heat bulb as the primary heat source I had a humidity level of only 32% and the room was at 40-45%. I knew I would need more humidity and thanks to all the advice/info here it led me to cypress. That will battle the humidity sucking red bulb and allows me to reuse this enclosure.