With the points and closing costs you pay when refinancing, you might look at what your payment would look like if rates dropped 0.50%, 1% and 2% to decide WHEN it would make the most sense.

Your property analysis should include funds to pay for a property manager.

Again, it may not take them that long, but unless you or someone you know is experienced in drafting legal documents and transferring title, it's called paying the price of admission.

Personally, paying off your mortgage early is a horrible idea.

"I don't know Michelle, we can give you $3K-5K if you wholesale it to us, & btw we can't pay you to relist".

You do need Form 4797 to calculate and report depreciation recapture and pay tax on this portion. 

Fort Drum has its own housing site and I have had some success on there.

All my properties pay my mortgages on all homes and break even. 

In this scenario the buyer effectively pays you, and you then turn around and pay the bank. 

Is it that the 1200/month original cash flow is now paying down the refi, and then tenants on the other 3 properties are paying down those loans?