You second property will rip I bet.

A friend of mine invested in one last year—apartments upstairs, a small coffee shop downstairs - and the combination of income streams made it a steady performer.Scaling with a 1031 Exchange:While not applicable unless you sell a property, planning for a 1031 exchange could help you scale quickly while avoiding capital gains taxes.

Looks like biting the bullet and getting an engineer may be my best bet.

Then I started to contact brokers that bought and sold Apartments complexes and proceeded to 1031 exchange all my Condos for Apartment complexes and told my story on BP Podcast 238 in 2017.  

I bet the rate of Engineers going homeless is all but 0. 

I bet that you can pay off this debt in 1 year or much less.

In both my seller financed deals the primary bank I was betting on backed out.

Now to all the people that want to criticize the 9% saying i should have just kept it in the stock market and i would have had the same results, not so fast.Now I can 1031 exchange into a property worth triple the value with no cap gains tax. 

It's hard to harvest equity on these plays, unless you commit, long-term, towards very light leverage, as the only practical ways to benefit from the equity in your portfolio, if you plan to never sell it, only exchange it, for a lifetime, are to spend the cash flow, or cash out refi.

If someone is willing to pay you $500k / year, I'd bet that you're a pretty high value / hard working person.