There are a lot of websites that offer the course online, or if you have a college near you, they also typically offer a class that satisfies the pre-licensing requirement.

@Andreas Mathews admirable, but make sure you do some research so you understand what a PM can make.Starting your own PMC business will require 75-150 doors to make a decent living, depending on gross rents and your fee structre.Working for a SFR PMC as a PM, will require a RE license and you usually get paid a percentage of the gross rents the portfolio of owners/properties you manage generates.

I make about 70k a year from my salaried job and my friend makes double that.

I own a 4000 square-foot warehouse that has about 1/3 of an acre lot fenced in. I'm considering leasing out storage space for boats and RVs.  Zoning says that it is a repair service shop, excluding automobiles, any id...

What would be the best ways to familiarize myself with construction process, while still maintaining my W-2 job? 

Be sure to do your due diligence and make sure the PMC is licensed (if required, it's not in all states) and insured.

My job is to submit bid and negotiate only.  

@Aaron Raffaelli what did you do before this job?

Without population growth, your rental income will lag behind inflation, requiring you to find additional sources of income.How long your rental income lasts depends on the job growth in the investment city.Non-government jobs are inherently temporary.

In neighborhoods that won't attract high credit score tenants, I've found that a stable job history with a MINIMUM of 1 year at current or previous job to be the best indicator of a great tenant.