But you may want to consult with an attorney on all of the above to be crystal clear about where you stand legally.You could also give the tenant a clean slate and just expect them to start paying rent to you after closing.

Clean it up, Yard work etc What was the outcome?

One person comes up with the idea to turn this land into an RV storage. noted this vacant land has no automated gate, no security camera, nothing. but he is willing to clean up the land and prepare it for the RV storage. after it's done, he will be marketing and managing everything.

1) how to do this2) what is the daily routine for full-time investor3) what education, courses, books, and experience require this4) can I have a mentor for this4) any further adviceP.S I am currently a part-time investor since 2012, it was an adequate experience.

I'm not suggesting you shouldn't read and review it carefully, but as long as the type of representation, commission, listing start and end date, and any cancellation penalties are what you agreed upon, the rest is likely pretty routine.

Solid work, reasonable pricing, and he shows up on time every day and cleans up after himself.  

Deep clean & quick rent out or something else? 

I fitted one nicer house with stainless steel, but based on the way the tenants handle them (dirty, dented, etc), I’ve decided to go with nice clean (and less expensive) white appliances.

Once our rooms were filled and leases signed - aside from normal cleaning and the occasional house project - our investment became almost entirely passive.

If you all have a clean financial horizon, I say go invest that money and make minimum payments on your debt.