So YES, based on the information you have given, the lease option to buy is what I would recommend. Especially since it sounds like you have a prospect interested in the deal.
PLEASE NOTE:There are a few specific contingencies I have recommended to my clients considering this route. These should be met prior to the new tenant/buyer moving in. I would be happy to discuss these contingencies at your earliest convience. Check out my website anytime.
That said, I actually think the lease with option to buy is a great idea in this market. I have had a couple buyer clients ask me about deals like these specifically.
Worst case scenario is you have your house rented, best case scenario is you have locked buyers into a price that is higher than what the market values are at the time of sale.
There are a number of factors that go into this, a lot of variables, all of which I can't cover on here, but generally with rent/option to buy you have 2 choices: 1) option to purchase at X date for X price, or B) right of first refusal (at X date lease ends and they have the right to buy for a negotiated price with their allocated rent from the last year or 2 going towards the purchase price). In both cases the rent money goes towards the purchase price so essentially the buyers are buying an option (putting a deposit down), which is a great set up for you.
The first scenario is not a bad thing for you unless the market goes up and they are locked in at a lower price, but in my opinion, unless the option is for 4 years from now, I don't think you will see a crazy spike and lots of potential money lost. The second scenarios downside would be there is the chance they would "refuse" to buy the property at X date (when lease is up) but the positive is that you still will have gained the rent during that time.
Hope that helps. Good luck!