Anyone have any suggestions.

I would suggest to review their last 3-5year financials, visit the place multiple times and check traffic, competition, customer service etc.

We've been communicating quarterly on the property status, but a simple search on Zillow made me think he's lying to me.

Are there any books, courses, or mentors anyone might suggest for someone in my position?

Are you fully booked but maybe not charging as much as you could or are you failing to fill your calendar (maybe you're not pricing competitively enough).If you aren't booking up your property then a tool like RankBreeze could help you increase exposure of your Airbnb listing while also doing some of those strategies Mike suggested.

(An exception is if you own 5% of the company you work for)Agree, this is a great summary post on REPS with core concepts on how to qualify. .I think the complexity comes in when people have edge cases - it becomes difficult to write a simple short post that educates everyone.

.  --- and... these issues become issues for the other Tenant and then turns you into the constant 'utility police' because you constantly have to monitor # of occupants... eww. 50/50 is simple and simply understood and 100% while vacant is also simply understood.

You can do well with a more simple approach, but it won't be easy either way.

any suggestions here ?

I'd keep it simple to start.