Obviously, you are not an attorney, nor have a law enforcement/compliance background and have not considered the intent of the CFPA and the SAFE Act. What was common in the past is the root cause of many of these laws, regulations and practices being changed.
How is the property to appraise out for the equity to refi? Chances are it won't.
The problem is that there are too many investors out there that have used installment contracts to manipulate transactions so that most buyers could not perform and thereby profiting from such activities.
Doing a deal over the market value with some bull sh** excuse to justify such activity. Sam, you're in the same boat as 90% of investors doing installment deals, who lack the depth of knowledge and understanding of underwriting future performance. IMO. If people are so dang smart on this site, why are they asking questions?
If you're going to simply do a deal the way you want to out of greed and justify your actions or startegy by saying that's how everyone HAS done it, and not listen, why ask a question?
Study the new legal aspects of the business. Without bias toward your opinion of how a deal should be done. If it is not crystal clear, get someone with the capacity to understand the material and explain it to you. Read it letter by letter, it's in english!