Even if you only averaged 2.8% appreciation annually, which if you've had it 20 years I have no clue how that's true given prices have well more than doubled in that time, youre skipping over the fact that you have been benefiting from that appreciation on the ENTIRE house, not just the % you paid for.  

The borrower gets the benefit of having access to capital fast and the lender gets the benefit of charging a higher interest rate and not having to pay taxes on the profit.

It’s true that many property management companies are now incorporating tenant benefit packages as part of their offerings.

It will familiarize you with the basic terminology and benefits.

If it's worth $1.3 million today, it will be worth $3 million or more in 20 years, you'll have paid off the debt (or most of it), you'll earn at least $3 million in cash flow over those 20 years, and you'll have tax benefits.

Now a-lot of times you buy a home from someone with seller financing and they hold the note for 6 months to season it and then sell the note to another investor or a firm and then it will most likely show up on your credit because these are more sophisticated investors.In regards to the benefits of owner financing you won't have to pay closing costs to a bank.

If you are only using a license to represent yourself...there is zero benefit.

It will familiarize you with the basic terminology and benefits.

Real estate investment can be incredibly rewarding, between the cashflow, appreciation, and tax benefits, it truly is the greatest wealth creation tool. 

I think there are some tax benefits that outway the small negative cash flow that you're currently experiencing.