Providiny superior finishes/cosmetics has allowede to get substantially more in rent..... again, as @Will Gaston said... usually their parents or scholarships are footing the bill.... so there is more room to raise rents based on how nice a place is vs a regular residential neighborhood. 

The fees are enormous compared to a regular loan.

Just set up a regular LLC now. 

I met with sellers on a regular basis (both in parks and on land).

Once occupancy permits are done, then you get a regular mortgage. 

They also handled the listings on all the main services, a pro photographer on their dime to take the photos, and regular communication on rates (they are dynamic).Hands-on like Lucas can be rewarding too.

Looking at it for Tiny Houses, you may find one that would be perfect for that but otherwise wouldn't have been a solid deal with regular mobile homes. 

So not all the benefits are for rental: you'll lose out on at least some of the gain exclusion, you have to pay tax on the rental income at ordinary rates, and you may have depreciation recapture upon sale which is higher rate than regular capital gains taxes, and you'll probably pay more mortgage interest over the life of the loan.

If there is an open market where bottles of water (or properties or whatever) are selling regularly, then it is easy to see what they typically sell for in that market and therefore if you are getting a good deal or not.

I just park mine in a regular checking account and wait for an opportunity.