That is the biggest mistake you can make. 

A half bath and laundry are in the basement so adding a full bath shouldn't be too much work, egress would be the biggest problem 

My biggest advice is to make sure you have the right team in place to handle your rentals.

What should I ask from them to verify they are a good fit for the KP.I read that the KP's biggest risk is if I file bankruptcy and they become personally liable for the loan and get sued by the LPs. 

Biggest thing you could do is take a weekend, come on down, and drive around!

Housekeeping is the single biggest headache for us, and we are right there.

If not full owner financing My biggest concern will be finding ways to make up what the loan doesn’t cover.

I would not sell off your portfolios, the biggest reason is that you will get hit with taxes on them this year that could create some bigger tax liability that you may need to save. 

This is really the biggest hurdle that most people never cross so pat yourself on the back for getting into the game!

Payment concerns:-->Get 2 more bids, ask about longer financing, put it on a credit card, put more down on it, go with a less expensive unit.Call the biggest and best installation company in the area and see what their payment options are.Go with a lower cost brand name.Find out if any of of the property's utility companies offer cash-back or cash-assistance for certain replacements.Just my 2 cents.https://www.youtube.com/watch?