Your 4.8% return on capital should be 12%-15% for the size and risk of this deal.  

I personally like to work with the returned mail and investigate.

I'm curious: where do you intend to buy property for max $130k that you'd easily prove can more than pay for itself?

Each vendor schedule everything with the tenants, no keys required.You should checkout Appfolio, they offer a call center for $200, plus with their software you can manage the portfolio more easily yourself or hire your own manager to do it for you at some point, etc.

It's cheep ~ $0.58 a sq ft, squares can easily be replaced if damaged by tenants, and works with pets.

I'm hoping to keep them in mind when buying or selling mobile homes and avoid running afoul of the laws of my current state to which I've recently returned.

It feels like we are paying for the living room to be returned to pristine / new condition which isn't necessarily our responsibility.

Think of it as a car rental business - some people will return a nice rental car with fastfood trash all over the back seat: that's generally fine, as long as it can be cleaned up.

The basement level had a 3/4 bath, a family room with big windows and sliders to a patio, and a laundry room that could easily have been converted to a kitchen.    

That is normally what many do, but it eats into your returns.