I don't know Texas, but I'm a real estate investor (in Virginia) who does lease-options (rent-to-own) and have been told numerous times that Texas has a law that effectively prohibits lease-options. I'd suggest talking to a real estate lawyer and finding out exactly what the limitations are and whether there are any ways to accomplish the same result using a different technique. For example, I know investors in Texas who are using land trusts. To greatly oversimplify, the owner of the property puts his property into a land trust. The owner initially is the sole beneficiary of the trust. Then the investor is added as a beneficiary, if an investor is involved. Then a resident beneficiary is found--a person who wants to lease, then purchase. The resident beneficiary is added as a third beneficiary to the trust.
Meanwhile, in a separate document, the resident beneficiary leases the property from the trust. So the resident beneficiary really has two roles: One as a renter, leasing from a trust. Second as a partial owner of the trust.
After a pre-determined time, the property is brought out of the trust and the tenant-beneficiary is given the right to purchase the property at fair market value. Although he/she is purchasing at fair market value (versus a predetermined price, as generally occurs in a lease option), that purchase price is offset somewhat because the resident beneficiary is already a partial owner of the trust.
During this period, if the trust is structured properly, the resident beneficiary can claim the same tax benefits (interest deduction, etc.) that a homeowner would.
There's a lot more to it, of course, but that's one way that rent-to-owns are being done in Texas.
But find a good real estate lawyer, preferably one who knows and understands these techniques.