For your price point, I agree with everyone that says to find a decent old 90's rigid MTB. If you can find a touring bike in your price range, it'd be a good choice, but they're not that common, at least in SE Michigan local sale sites.
Originally Posted by
Caretaker
The OP is unlikely to lose any significant weight just by taking up cycling. Needs to change diet as well as exercising more.
Agreed that cycling isn't a great weight loser in itself, but it doesn't mean he won't experience noticeable other health benefits.