Sure, trailers are "self" sustainable so a limited amount of time without all those services, however, then you would have to hook up the trailers and continuously be taking them to dump the tanks, fill with water....

It's not sustainable.

Rock bottom rates are sustained when concern over inflation is replaced by fears of disinflation and outright deflation.

Getting your RE license is very easy, but building a sustainable RE business is not.

The real question is what type of rent can this property in this neighborhood sustain?

Also , I want to make sure I move somewhere in the Memphis or surrounding area, that is likely to sustain rising Property Values, along with Steady .... $1,100 - $1,300  Rent ranges Also maybe Lakeland as well ?

RE is a great career and a way to build sustainable long term wealth.

As you begin to consider the cash flow opportunities outside California, you may consider the Orlando Metro Area for its historically low vacancy rates (around 3%), very low unemployment, fast appreciation, and sustained population growth. 

I would say MikeOH has a sustainable model where not only does he have sufficient cash flow he is using bank financing to grow his portfolio.

We all have varying business models and ways of doing business and sometimes those do not connect or resonate with others.