I was paying 10k BAC and my houses were 600 to 800k.. 

I've been told the hard part is finding a builder who's willing to build without me paying a large percentage upfront.

Are there if any sites specifically filtering seller finance deals? 

They also mow the lawns, shovel the snow, pay most if not all utilities, and provide most of their own appliances. 

Here, we were after an asset we could pay off quick & cash flow aggressively.

There’s nothing worse than a lender that over promises and then can’t deliver (sometimes they don’t even review your file before giving you the pre-approval letter and assuring you that all is well, charge you for the appraisal and let you go through inspection and pay for that out of pocket too, then their underwriters get involved and discover some reason they can’t process the loan leaving you high and dry).

If he doesn't make a decision - in writing - then he is required to serve the remainder of his lease, or has to pay a penalty to leave early.

Get to know who are doing business with and never pay an upfront fee.

Just google skiptrace and plenty of sites out there to research public info on people.

It falls apart completely if you think of yourself as as tenant and pay yourself rent (that you would otherwise be paying someone else).https://www.richdad.com/your-house-is-not-an-assetI prefer the quote from The Richest Man in Babylon, "Make of thy dwelling a profitable investment."