Not sure how the "rent to own" concept works, but I've seen several people sell a rent/option to purchase to tenants. The idea is that the tenant gets to lock in the purchase price for a future purchase. They pay an option fee, which the landlord keeps if the option is never exercised. Then, they pay rent at a slightly higher premium than normal. The agreement is that a certain amount of the rent will be credited to a down payment if the option to purchase is exercised. If the tenant never exercises the option, the landlord also gets to keep the increased rent. Usually, the tenant treats the house with more respect, because they're building up a potential stake in the property. However, legally they're still tenants and there is no problem evicting them if they fail to pay.
This is a great concept for the seller if prices are stable, and allows the buyer to build up some pre-equity. If prices are rapidly increasing, it makes little sense for the seller to lock in a price now. An acquaintance of mine sold a rental option on some commercial property near mine about two years ago, for example, and when the tenant exercised the option a few weeks ago, they turned around and sold the property for twice what they paid for it the day before. The seller was sick over it; his option price was nowhere near the amount of increase.