After millionaire, chop wood, carry water.You shouldn't let externalities define your inner person.

My current plan is to define a class per rental property, and assign my tenants as customers (when they pay rent).

I think the BRRRR report is a good place to start, but it is missing A LOT of the important metrics the pros (like @Brandonturner ) use to define successful deals.

Agreed with Nathan G. with all this, clearly defined goals and taking one step at a time in direction will defiantly help.

Broadly analyzing, the 50% rule leaves me with $1200/month for mortgage and cash flow.

Qualitative research is inductive and does not require a hypothesis in order to start the research process.Let us take a closer look at this important difference, and dig a bit deeper into three key terms that help define quantitative and qualitative research.Deductive researchHypothesisInductive researchQuantitative Research ConfirmsQuantitative research looks at the general case and moves toward the specific.

What we see on there -- and this is a broad stroke -- is that a 3-4br home can nab $40,000-$50,000/year in revenue.

Is it difficult to define the distribution of responsibilities or equity?

I also understand there will need to be defined roles for everyone. 

If parking is scant or ill-defined it is bound to be a pain-point for your tenants (and you) and something that fuels their turnover more than is good.