You could also try turning it over to a collections agency. 

What do you collect for rent for the property if I may ask?

Growth is great and necessary to likely hit your financial goals, but collecting underperforming assets is not a way to get there.  

I.e. in my area, which seems to be a high tax area, I pay about 2.5% of value in taxes per year but that also includes garbage collection.  

He took 10% of my rent collected and when things broke he got a handyman to do the work and added 10% onto the bill. 

I have worked in property management for 2.5 years in the Boston Ma area - I am an aspiring investor but collecting capital to begin has been my biggest road block.

You will collect rent and the equity will build.

They knew the monthly payment component wasn't reliable, so they purchased them, and unloaded them for the "cash profit today" option, as fast as possible, rather than the longer term "collect monthly payments" option (which, if there are going to be monthly payments, is generally more profitable [especially if they were ARMs that go up in interest rate & payment over time{1}], that's why everyone wants you to sign up for a monthly subscription for this or that).

Trying to understand if this is the Collections process where the Debt collector will call the tenant to recover rent before judgement?

These are collectively referred to as a bunch of different things like "non qm", "commercial", "portfolio", and "asset-based" lending.