For starter, I am married to my 9-5 job and looking for a way out.

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

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560 (almost 30% probability of default), little to no good tradelines, lots of collections & chargeoffs, recent evictions.

Has the tenant been looking for a new job?  

Reason: I signed a new job offer at a nonprofit yesterday and having extensive knowledge of the real-estate market in Philly would be very helpful.

Some of them have converted to flips, but I do not do flips because it is a job (stop flipping, stop earning).  

Anyway, the current auditor set the current rates, and is still at the job..https://www.hamiltoncountyauditor.org/

However, even though they both have jobs now, they still do not pay the weekly rent that they promised to pay.

The technicals (migration rates, job growth, tax situation, debt cost, etc) to work as well.

For instance we have seen dozens of sand and stain jobs on hardwood at $2/sf that needed to be completely redone.