The pros of course are in getting a credit challenged buyer into a home quicker. In most cases you lock in the price and then a percentage of your lease payment even goes toward the purchase price.
Now the cons. If that seller goes belly up and stops making their mortgage payments the bank will foreclose and you will be out with nothing. You basically at that time are just a renter you would have no legal claim on the home.
Your best bet is to find a good buyers agent and let them find the homes that are available in your area and that match what you want in size.
Hope this helps,
