@Douglas B. I currently have 2 duplexes, each cost 30k and the cash flow numbers do generally look good. I purchased them because it was the easiest for me to get into given the low prices.
I admit, I've been lucky compared to other folks, but the cash flow does catch up with you. Just today I was informed that my tenant had a small kitchen fire, almost every month one of the apartments has a water leak, electric outlet issue or something minor. Fortunately I don't deal with it, that's what my property manager is for. Thus far the cash flow is still positive, but it certainly feels like a drama at times.
I've had tenants come and go, complain about drugs in the neighborhood (knock on wood no murders yet)...I was offered crack once driving through the nearby neighborhood to check on the properties...
I hope it's a transition, build experience with a limited investment, then move on to advanced opportunities for me. It really was my 'piss or get off the pot' move.
Good property management helps a lot...I'm fortunate at the moment to have that now.