The Buy and Hold for appreciation hurt many investors during the last recession. It was very speculative. Purchasing (or controlling) a property with no money out of your pocket is very safe. Net rents of $100 are great when the investment is zero. With that being said, I would not start off with "buying" rentals, especially in an area more than 50 miles away. Obtain properties 'subject-to' and lease option them. If done correctly, zero money out of pocket, hefty lease option fee to you, higher monthly net ($300+), better tenants and no financial recourse in case of bank default. This is the simplified version.
As for which market is best? Look east of the Mississippi River and the Rust Belt. However, start locally and learn how to work remotely. Then, experience will help you see that any market you live in is great.
