While seller financing offers numerous advantages, including tax benefits and continued income for heirs, it seems he's set on selling for cash.

+For Airbnb, list at the beginning what your set up is (2 bed/2 bath), since the filters return everything that is 2 beds+ when someone puts in this filter.

If you're dead set against a refi there are investment HELOC and HELOAN options, but they carry a higher risk and therefore a higher rate being in second position (likely in the neighborhood of 11%+). 

Depending on your timeline, property location and plans for after the Trust is set up, I have some recommendations in mind.

Every loan program sets a maximum percentage of that value that someone can borrow. 

As an additional benefit, the tenant/applicant sees that I'm not trying to make money from the application process and that sets me apart in their mind from some other landlords who do or whom they feel like are doing that. 

It might be possible to set up a water tank with an auto fill system. 

I agree what others have said sweat equity it and do what you can hiring out only what you have to in order to take the shortest straightest line to cash flow coming in. by the time you sell this thing you will have 2-3 more payments out the door as well. its clear to me, they both hurt but the option to hold will recover...some day.so you either set yourself back for a couple years losing and paying on a property you dont own or a little every month on one you do that will eventually have upside, unfortunately if i was in your position i would look in the mirror and say made your bed- lie in it. 

For one, I actually get leads (not prospects), and plenty of them.These are LEADS, as in people took the initiative to reach out to me to do business with, not prospects that your AI, prop stream, batch leads cold calling, driving for dollars, door knocking provides.You are not improving the performance of lead generation with AI.

Remember that if you allow this to happen, you are setting a precedence moving forward.