Lease to own is a horrible idea. It never benefits the buyer. If you can afford to rent you can afford to buy.
You do have to rent the space. It varies from space to space, but it's usually close to $600/month. The space rent typically goes up slightly when ownership transfers. You must be at least 55 years of age to live there and must also be approved by the park management (they usually do a credit/income check as they want to verify that you have at least three times the space rent in verifiable income).
If you have further questions, feel free to contact me at 707-747-6600.... more