You don't want the shelf falling down on her head and have her sue you. 

I apologize if you believe that this is not a civil comment, but it is true.The OP got this building for free... his cash flow and appreciation is essentially infinite! 

Adding other lot (when they have 10) is infinitely easier than running the first lot.

Financing is renting money, money is the product on the shelf.

Proper due diligence is worth an infinite amount of money.

You don't just walk into the store, grab a pair off the shelf and walk out.

Oh I remember where I heard this particular stock market cycle theory before, I just had to google "17.6 year stock cycle" looks like it has a lot of shelf life with many different prognosticators. 

Since I don't know anything about being the Fed, I'd just do NOTHING, which would be infinitely preferable to what the Fed is doing!!!

(with essentially $0 invested in the house, so it is an infinite % return if you get any cashflow)+$39,000 cash (new mortgage of $144,000 - all expenses of $105,000)You could use that $39,000 to go and buy two more properties that are $85,000 each ($17,000 down [20%] each, plus a little cushion for closing costs)....or a multifamily for $170K.Then you would have 3 properties, with $0 invested!!! 

A handful of tough years are infinitely better than not being able to get a loan or a CC for 4 years and then spending the next 6 only being able to get crap loans and low balance CCs.