The other concern is that I don't agree to something I didn't expect to. 

I was looking at mobile homes in my area, and some look like a good investment for rentals. 

A book or study that will answer questions like: What are the requirements of big businesses such as Starbucks, McDonalds, Panda Express, Mobile companies, etc., in leasing a properties?

I am concerned it is price.  

Also, your situation is likely difft than mine where you may not have a high mortgage to deal with and the rent numbers pencil better for you.If there are any negatives, not many, but 1 concern i had back then, and still do, is they just keep building and building and building more homes.  

Any glaring concerns?

We will be the only rental on the market in our area that has a private pool and for that reason I am concerned we may have a ton of interest from folks that may not qualify.

I stipulated that emergency calls would be answered right away only if they concerned electrical, gas, or water.

I think one of the reasons for a low home ownership at the moment is because people are being very mobile right now.

Utilities are less of a concern because you should let your tenants pay if units are individually metered or use a chargeback system if they are not individually metered.