Yup. I was renting one unit in a duplex. My landlord put it on the market at a way-too-high price. Fast-forward nine months of having to get out of the way when the real estate agent wanted to show the property, and the price steadily dropping into my range, and I realized it would be a real PITA to have to move all my stuff out and find another apartment if someone bought it and hiked the rent or wanted to move into my unit. Went to one bank, was told that I'd need to put down 20-25% on a commercial loan. Went to another bank, and the loan officer worked out that I could get an FHA first-time owner-occupant loan, since I was planning on staying in my unit, and renting out the other one. Stockpiled cash for a few months by only paying minimums on my credit cards and cutting back on anything extra, plus a little help from my folks, for the down payment(FHA was only about 3.5% down), and bought the building.
Now I'm collecting $1300 a month rent from the other tenant, which covers almost all of the mortgage and taxes. Upkeep isn't that big a deal, since the way my lease was written, I was already responsible for all of the groundskeeping and snow removal when I was renting anyway. Also, it's worth it to make sure you have good tenants, that pay on time, and don't make a mess.