The fact that he didn't immediately reject our offer was a good thing in our eyes. 

That is something we need to get a hold of since it sounds like no one has seen it with their eyes for a long time.  

By the end of next year I'd like to have moved into larger multifamilies with an eye on reaching 31 doors.Reach out, say hello - I'd love to meet others who're on the same journey!

His biggest complaint was the amount of time it takes to get paid.Since you will do lots of traveling, you should keep your eye open for abandoned properties  (driving for dollars while doing your day job) and perhaps you can locate a deal.

After the listing is under contract, I would still keep an eye on those listings.

Whenever there is any condo/townhouse listed for sale, I would like to read CC& R (Covenant, Conditions & Restrictions) and bylaws.

The only thing I can think of is some kind of restrictive covenant that may exist if the two lots used to be one.  

Having said that, you should relax and search for more investment opportunities, and keep an eye on the one you tried to buy. 

If I like them it may open my eyes to potential angles I can keep an eye out for. 

I'm busy with flips for now, but always keeping my eye out for a good rental.