I would take them all to small claims court for the damages in your apartment.  

I'm a part of local real estate investors meeting and I have some good realtor contacts.

The place I have is over 30 years old and a mansion ("mansion" in Japan means an apartment, not "mansion" like a huge house). 

Does it look like a modern-ish apartment with breezeways and internal stairs, or is it built like a roadside motel with long walk ways along the front.  

I don't know anything about commercial or apartments so I can't really help you there.

I've done and been a part of many Chicago zoning changes...they take a very long time and a lot of upfront money...unless you are planning to add multiple units and do a full renovation, the ROI is probably not there.

In today's competitive real estate market, having modern amenities can set your property apart, making it more attractive to a wider audience.

It is mostly SFH rentals, and some apartments.

Buyer is a newly formed LLC out of Houston, so even farther away.  

There is one upstairs apartment that can be turned into a str.