Contact a local lender or realtor they can help you.
Realtors cannot write a contract that is executory for more than 180 days - only an attorney can. So, we can find the property, negotiate the deal, but it requires an attorney to draft the contract.
Secondly, owners selling on such contracts are under such an onerous burden of reporting that many of them simply don't want to sell that way.
I actually receive lists of owners offering such deals, but the terms are not pretty either. Typically, they're looking for 8-10% down payment in cash, plus other terms that often scare off potential buyers.
Executory means that the right to purchase extends from the time of execution until closing over 6 months into the future.
There are other possible solutions, but rent-to-own is much more difficult to do in Texas than in past years and other places.