If she pays, then your really out of luck and you have to sue her in court for breaking the lease and damages.In general, I don't take people to court once I have the property back as the attorney fees and the fact you RARELY collect on any judgements (15% of the time or less) eats any profit and wastes your time.

I'm not familiar with Maverick; I have been impressed with (although haven't yet invested through) Norada, which likewise connects investors with turnkey providers in target markets. 

Next, I'll be pivoting into subsidized housing investment and collecting rent $ from the government as i truly do believe this is a way to boost CoC return percentages in today's market.

If door knob break (giving a simple example), Doorvest will charge me the price of door knob + contractor fees (Doorvest will not collect additional fees for themselves).

Tenant and Lease ManagementSimplify tenant payment workflows, digitize receipts, and efficiently manage leases, rent collection, and maintenance requests, etc.5.

I am considering other options to see if there are ways I can hire someone to just do showing only and mamage my own rent collection through Zillow app, I also have my own contactors to do maintenance but have been paying monthly fee to my property manager who has done literally nothing, they also never answered my calls.It definitely sounds like you need to reevaluate your relationship with your property manager.

It is unfortunate, you can get an attorney/collection agent if it is truly fraudulent.

When looking back, that isn't an accurate way to do it for a variety of reasons, plus it is a hassle every time to do the math and collect.  

What if they have collections or judgments?

In none of these scenarios are you selling a property that you do not own, you are either selling a property you own (double close), or assigning a contract to collect a fee.