The HOA is responsible for monitoring that owners do not violate the state and local sound transmission limitations.

I don't know (recall) if they are in local ordinances but I do recall vaguely seeing some legal / ordinance type of material detailing when it can and cannot be done, regarding building in a way that directs water towards a neigbors property.I don't know Chicago that well, but as a homeowner I would try calling your local building and permit center and see if one of the local inspectors can direct you to the code section to read.I'd do that before anything else because knowledge of those ordinances will arm you / prepare you best to approach the other parties.With regards to the possibility of 'dealing' with the water, I'd be thinking about ways to do that, too - in the event that the above / negotiating an alternative solution is not fruitful. 

.$65 https://www.kickstarter.com/projects/azapps/osiris-the-65-smart-water-monitor#$200 https://www.homedepot.com/p/Streamlabs-Smart-Home-Water-Monitor-UFMT-1000/305141000$500 https://meetflo.com/products/flo-home-water-system/$700https://www.phyn.com/product/$800 https://www.buoy.ai/ (includes install) or $18/m0

That’s a difficult one for sure, and not much to work off because “it looked like” the wall was leaning in.Worthwhile to establish a baseline for now to monitor going forward.  

Because of monitoring and medical technology on shift they have one doctor monitoring machines of patient vitals throughout the facility, another making rounds, and another to respond to emergencies/codes.

@Michael Baum gave excellent advice - if it is possible to get a long-term renter so you can make a better return, that seems like a good solution until the market is better.  

You must be consistent with your marketing efforts so that you are the solution lying on their table when that time comes. 

Divorce, probate, foreclosure, moving, have owned for x number of years, have equity, etc. and marketing to them your solution to solving their problem (buying their house cash fast, no repairs needed, etc) Thats where all the off market deals are found. searching BP for a few hours you can find how to do all of this pretty easily. 

I'm glad you found a solution.

That's tough..I am assuming you are not flipping and you are talking buy and hold.. flip I would say no way..go out and manage the project till you create that team you needBuy and hold, with Technology the way it is today I would say you could very easily track and monitor the progress.you would probably need a property manager or a general GC to manage the teams and make sure things are moving along especially hard money draws that have to be met.