I'm not sure what you mean by "profit." Are you hoping to be able to make a living off breeding snakes? Or do you just want to have a few snakes that you enjoy keeping and breeding occassionally to hopefully bring in a bit of extra cash every now and then? While lots of people breed snakes, I'm not sure how many actually make a decent living doing only that.
You would also have to think about shipping and such, as there may not be too many herpers in your area.
As for what type of snakes are most profitable... well ... since I haven't bred any... yet... then I don't want to hazard a guess. Personally, I would simply pick some snakes that YOU enjoy keeping just for yourself and not because they might make you money in the future.
Take care and good luck...
Annie B. <:3 )~~