The renter gets to "try before he buys", a great concept in today's market. Also, if he finds that this IS the house that he wants to buy, he doesn't have to get financing approval up-front nor will he have to move at the end!
In some cases, he can be earning a "rent credit" and actually have $$ to use towards closing costs/prepaids, should he decide to go forward with a purchase.
If you would like to speak in more detail, or need the name of a great realtor in your area, please call me at 440-376-5475.
Happy house hunting!!