I've detailed below both the advantages and disadvantages of Non-QM loans/lenders.

Any advantages or disadvantages you've experienced?

You don't get a 30 year rate lock is the biggest disadvantage of them.

What’s the advantages and disadvantages to personal name vs corporate name ?

On the other side of the coin any disadvantages to holding the property.

You can usually run a few lamps, alarm clocks, phone chargers, etc no problem, but if the tenant wants to (say) use a hair dryer in the bedroom, they might end up popping a breaker.One disadvantage to a window unit, especially if it's on the first floor in a less-than-great neighborhood, is that it's relatively easy for the bad guys to push it into the house from the outside, and then climb in through the resulting hole. 

The cap rate is pretty good slightly higher than 10 % and the disadvantages(In my opinion) its 1902 year old building and it runs septic system .

In a case such as this, the licensee’s real estate knowledge and experience could put the other party at a disadvantage, if that other party was unaware of the licensee’s true status.This rule also applies to those licensees who advertise regarding their own property.

From an evaluation standpoint, how big of a disadvantage am I putting myself at knowing the park owns more than 75% of the homes in it?

Realistically,  you are at a disadvantage with the 6 month as you have contractually agreed to let him stay there if he pays for 6 months.