You should have boiled them down to the following lack of proper due diligence.  1.  

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

@Gerald Koonce Private lending from family members is allowed with proper documentation and compliance.

Now if it was definitely a single unit and only she could do it and it was properly labled it would be on her.

This likely means living in Louisville proper, depending on the job's location.

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

That can be legally done under the correct situations.You made some serious mistakes in the purchase, that proper training would have prevented.Again, Subto is legal, when done legally and I am not saying you've done anything illegal.The real solution is to sell and pay off the loan.

We network with other fix & flippers teaching them how to properly structure a seller financed note so that it has value on the secondary market, we then buy a partial from them to take out most, if not all, of their cost basis so they can recapitalize and go do another deal. 

Proper bookkeeping will help keep track of who has what dollar amount invested into the property in case of a buyout or a death.  

If he truly felt like I had wronged him, he must follow the proper channels.