They may argue they couldn't pay you because they just made a $10,000 improvement to the house. 

So as the new build went on, we focused on improvements to our first home and got it ready for tenants.

IT can definitely be improved from an ROI standpoint with metered and reassigning all utilities, charging for laundry, renting garages to tenants, renting storage space.I own a portfolio of duplexes and single family properties that are doing well. 

They listen to what you suggest and continually improving their software and processes.

Plenty exist for private lenders (which is what seller financing is) and can track payments and am tables and also do automatic electronic withdrawal (ACH debit) which helps improve the likelihood of getting paid promptly each month.

Looking to improve my investment skills, I decided to get my residential home inspection license which led to me starting HLC Home Inspections.

As others have said, the best thing your son can do is run far from this deal, buckle down, save his pennies (he probably already is doing this), house-hack, and improve a property with sweat, hard work, developing a DIY skillset, and self-managing tenants. 

If the fence is shared and in bad shape, framing it as a mutual improvement could help.

As I said earlier, this is strictly for investment purposes.The property does not have to be turnkey, if there is room for improvement that's of no concern as we both have the skill set to invest in whatever upgrades are required.

, whether there's a high water table that encroaches on any underground utilities or foundations (and does that water table have significant seasonal water level variations), encroachments by roads or other improvements on your property, limitations imposed by easements or rights of way, etc.