I did a lease option for a gal dying to "buy" my mother's house but first, wanted to lease it for a year. She paid $1,000 for the option to buy. There were no additional amounts of money toward a downpayment etc. - just first option to buy in the contract. In the end, she extended her rental for another six months --- long enough to buy another house in the fall when replacing her was difficult. Left a bad taste in our mouths.
Also, did one land contract where lawyer assured us that if the person walked away or defaulted there would be no legal steps to take recover possession again. Simple. The person got to take insurance and taxes off as if he owned the house. First, he stopped paying insurance. That puts your mortgage company in a panick. (Not many mortgage holders will allow land contracts to be done/recorded) After he left and the house was to be sold, the closing attorney had a fit to have him personally appear to sign a "Quit Claim" with regard to the deed transfer. Can you imagine dragging a land contract failure to your purchaser's lawyer to sign anything? What a nightmore. And, not every buyer will accept quit claims in the chain of title.
Make sure you check with some lawyer that's better than the one's we used to do these type transactions.