However, it's hard to know whether that person is marketing and operating their STR well or not.

Personally I'd use it as a DP for a hard money loan on a flip or BRRR.

Some have online systems, and others require you to go in person.

I have done extensive research on the area on the population, schools, hospitals, jobs, and the age group I'm targeting, and I've seen all the streets and the whole town as much possible without actually being there on google street view but i will be driving over there this weekend to get a real vibe of the place probably talk to locals.I pray that another major 2008 does NOT happen while I'm incurring on my first investment property lol..

I'm not a fan, of this idea, but there are some property managers around that charge $150/person app fee. 

I personally know two people who are flipping mobile homes and have good success. 

I have personally spoken to 3 attorneys who all said the same thing as you, and I have communicated the same to the board.

If in doubt, consult with your tax professional for personalized guidance.

Maybe you print out a copy of the contract and go meet with them in person about what you're looking to do. 

They require you to have at least 3 tradelines, which can be credit cards, auto loans, a mortgage, personal loan if recorded.