There are 2 improvements on the 3 lots, 1 of which is habitable, and currently rented out.

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

I also appreciate your insight about the ways to make profit from a rental home - I have a bad habit of focusing only on cashflow.

Its amazing how real "sitting on the commuter train and daydreaming about financial freedom" habit is!

My planned offer includes an inspection contingency, to prevent any habitability issues from turning my deal into a money pit.  

He’s trying to lay the case that I’ve caused him physical harm, since he’s undergone surgeries and only given a short period to live or something.

You might want to read our series about “How to Screen a PMC Better than a Tenant”, since selecting the wrong PMC is usually more harmful than selecting a bad tenant: https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processes__________________________________________________________________________________________You might want to follow the "Deep Dive" series we're doing on our BiggerPockets blog about Metro Detroit cities and City of Detroit Neighborhoods:https://www.biggerpockets.com/...

Great ideas -- I have a ReStore near me as well -- I need to get into the habit of keeping an eye on their inventory.

For instance, if Buyer has not cancelled/terminated the contract to seller in writing, THEN the Buyer agrees to proceed past inspection to closing, etc.Different than I understood it through past realtors but sounds like there is no harm in the OP submitting another offer. 

Create habits to habitually construct a person who others view as always reliable, cool headed no matter the complexity.