To ensure accuracy, verify comps manually by reviewing recent sales in the area, property condition, and similar features.

As others has shared, I am able to hook them up properly to avoid any issues with tenant installation.If a unit dies, and I do not want to replace it, I just terminate the addendum and remove them. 

My systems are ok, rather I have to give credit to the individuals I work with as well as proper tenant screening.

I’ll try to answer some of your questionsonce a note has matured the note holder has the legal right to call the note due - with proper notification to the debtor.  

What measures have you taken to ensure some safety and deter local nuisance?

. - Agreed, sounds like you don't have the time to properly vet candidates.

Just ensure you're transparent with the seller about the process and keep communication open. 

Ensure you account for HELOC interest in your cash flow.

He has compassion and heart and ensures that his clients are well taken care of and that the rehabs are pristine.

Operations- tenants refusals, either cull them before they get to you by requiring autopay as an example, document on their application why you refused them, make sure your facilities are maintained properly and no safety hazards exist, etcLLC.