The potential is good if those properties are not in so bad shape when you get them. If so, you need to have them repaired or remodeled. It's good if you know how to fix them yourself, you only need to buy the materials. After the remodel, you need to put ads in the newspaper to find a renter. You need to check references as to the prospective payment history. Be sure to find someone who has a stable job to rent your property. Otherwise you'll be faced with eviction in case he does not pay you.
I hope you are in a good desirable area.
Good luck with your venture.