Also most investors are scared off by foundation problems so I tend to get a better deal than I can on other typical rehabs.

This is where things tend to get crazy managing all of these systems.

MH tends to depreciate over time here in WA.

This will give you a vapor barrier under the floor. 

HVAC guys/gals can do it, construction guys/gals too.The best I know about dryer venting is to use a rigid sheet metal type vent channel for as much as you can, running in the direction of the exhaust, not the flexible accordion type that tends to catch lint.

I feel like I tend to get over excited and scare people off.

Whenever you learn a new skill you tend to start a little rough.  

Long term rentals are 100% occupied, 100% of the time and tend to have a waiting list.

Hiring people who worked in college is the way to go.I notice that my tenants who work while attending the local universities tend to be better renters.

I tend to work exclusively with high net worth investors on the commercial buy side as a principal broker.