What is the typical cost to have a ball python for pet?

Yeah, I was referring to those disposable heat packs. They only last long enough for the shipping of pets. So I guess your heat pack is something new to me.

If I were to get a ball python or any kind of larger species of reptiles, I would try to get an enclosure big enough for their adult size. I don't know if it work exactly the same. When we stock fish, it is known that we should get a setup according to their full adult size rather than their current size. It is also in fact cheaper to get just one setup for the long run instead of having to upgrade later and end up with two setup.