In the 90s after my grandfather died, I took over the management of his rental property that my grandmother inherited. When I went to collect the rent for the first time from a long-time tenant (she had lived there at least 15-20 years and raised her children in the house,) she said she had a business proposition to discuss with me. She'd heard about this new thing called "rent to own" and wanted to know if she could do it with the house she was renting from us. I said that I wasn't sure about my grandmother's intentions, but anything was possible for the right price.
The tenant was ecstatic. She repeatedly said how much she'd always dreamed of being a homeowner. I asked what her plan was. She said she'd spend some time figuring out her offer, write it on paper, and present it to me when I picked up the rent the following month.
The next month, she gave me a sheet of paper with very neat writing. It stated that she'd been there X years, paying $X per month. There were two options from which she expected me to choose. The first was that she could give me no money down, keep paying her rent in the same amount as always, and we'd sign the house over to her in a few years. The second was that maybe she'd already paid for the house by paying the rent for so many years, and maybe we even owed her a little refund back for overpayment. She was completely serious about it all, and honestly didn't understand why neither option was realistic.
I laughed all day and night.