They are paying you an extra 5% per month.

I understand what you are saying in terms of having to pay the extra 650 $ a month.

If we need customized items, like a Leasehold DOT on an airplane hangar portfolio, then we (borrower) pay extra. 

I had an empty LTR that was unfurnished and they paid an extra 650/month and also paid to furnish it for a 6 month rental. 

But remember that what is favorable now could come unfavorable in the future as they readjust over time.Reasons many landlords avoid vouchers include the hassle of the extra inspections, the perception of a worse tenant, and maybe the inconvenience of getting rent from two different parties. 

So yes no capital gains tax, and didn't put any extra principal payment.

You don't need to add the extra step of doing a cashout refi as you aren't keeping it and it costs a lot of money to cashout refinance.

The dollar-peso exchange rate benefited us with respect to fees, so we have some extra class A shares we can use as collateral. 

Everyone needs to be extra careful and do their homework.

If things are tight right now, maybe consider a side hustle or extra job until rent adjustments give you more breathing room.