witch kind of incubator

what type of incubator should i use to breed my ball pythons

Slow down there cowboy, You just got the snakes.
Why not take some time to learn about the proper care of them first before you jump into breeding.

What I would do if you are looking to have more than 1 clutch is get an old mini fridge or wine cooler. Then turn it into a incubator by using heat tape and a thermostat. In my opinion it works out great for small breeders. Not to mention they look pretty cool.