One of my step-sisters (the one I get along with) did quite well for herself with this strategy. She bought a duplex (house divided into two side-by-side apartments), lived in one side and rented the other side. As rental (and home purchase) prices increased in the area where she lived, she was eventually able to charge enough rent for the rented half to cover the mortgage for the entire property. That mortgage got paid off early, and she moved herself into a nice big house with 3 acres of land, including a horse pasture, and enough room for her growing family (at the time, two teenaged kids and one "oops" on the way...not "oops" as in unwanted, just "oops" as in unexpected). The rent from the duplex then paid (still pays) her mortgage on the new house. So, she owns one house free and clear of any debts, and a second house that her tenants are paying for. The reason is that the cost of rent will always reflect prevailing market prices in the area (if the price of houses goes up, landlords can charge more for rent), but landlords are still paying the same mortgage based on market prices when the bought the property. They might just break even initially, but 10 or 15 years down the road, that mortgage is substantially cheaper than the rental prices. Even in the short term, rent is going to cost more than a mortgage because the landlord is going to charge enough to cover the mortgage, insurance, taxes (which you'd also pay owning the house), anticipated repair costs (which may or may not end up being needed), plus include something over that to keep it profitable.