That would depend on what a manager can set up for you. If you had some good amateur reputation say a golden gloves title or some kind of reputation then you may be able to get a better arrangement.

If you went straight into the pro's you may make a grand, maybe more maybe less, it depends on a lot things really. It would be easy to go full at it when you're single, but you got a family to care of. You should really think this through. Why don't you plan ahead, get yourself back in good form and see if you can handle it.