Personally I find that a red flag unless they have a good reason.

In my many years of experience, if a GC would even consider negotiating, that would be a huge RED FLAG.

( He worked as a part-time super for a few other much larger buildings so this was welcome supplemental $$$ for him)If you manage properties in the area (say anywhere in the area loosely bordered by Sunset-Park, up to GreenPoint to Williamsburg & Bushwick, down to Lefferts/Flatbush (see red-circled area in map below) let's create a little 'union' to share a part-time roaming Super !

Most buy homes or look to soon after they get here so they are probably not your target renter.SLT is hard (but possible) to build in they are allowing ADUs if you can jump through the red tape of permitting.

I recently got multiple red tags on a property for unpermitted work that was completed by previous ownership. 

Granted section 8 does have more red tape.

I suggest you get with the SA Housing Authority, it's one of the best in the country (next to ours, hehe), ask them what areas are in demand, not what area to "red line".I love the area, not real familiar overall, it's a big city, but I might suggest you look around FT.

I believe they have streamlined FHA 203K loans when the rehab is less than $35K which has less red tape associated with it.

All of them have red arrows with prices coming down, I think one out of 3 pages of listings is pending.  

That's a giant red flag for that grocer potentially declining to renew their lease, vegan gluten free customers don't want to walk through a cloud of cigarette smoke to get to their ethically sourced non-GMO organic avocado, and obviously the "no smoking within 50 feet" sign is going to be ignored by the customers of that neighboring business, who are all a bunch of smokers.