What snake is best for me and how much would it cost to care for one?

I am looking to get a small house pet. At first I wanted a sugar glider but they are over 100 dollars and its best to get 2 of them. So I have decided I want a pet snake. What is the best snake to get for your first one? Will they bite and if so will it hurt/Do they have teeth? How much will it cost for Food, Cage, etc.