What you need to do is set up a realtionship with a mortgage broker that is will to counsel the clients over the period of the LTO option.
I work with a couple of groups in Vancouver and take mortgage applications from their potential LTO buyers. I review their application, identify what the pitfalls are to qualiifying today, and provide and few recommendations on how to repair their credit or resolve whatever the issue is.
If the clients are successful and proceed with the LTO, then I will contact them every 4 to 6 months over the term to check their progress. As we get closer to the end of the term, I will arrange for a pre-approval, so we can insure they are able to complete at the end of the term.
Part of the problem with LTO programs in the past, is that no one worked with the tenant buyer. And whatever issue they had today, was still an issue 2 years down the road. The process above helps to increase the success of the program.