It doesn't make sense to me that we all live in isolated dwellings and pay an arm and leg for separate utilities, not enough room to grow and share crops and rooms we mostly use to hibernate in.

We are searching around still trying to isolate the exact neighborhood in Milwaukee to invest in.

If you tile, you would absolutely need an isolation membrane.

Commercial zoning is almost always located closer to main roads and hotels have always isolated visitors outside of residential neighborhoods. 

People love a good excuse to gather, after so much Covid isolation.

,Use the Rustoleum Clean & Etch or Cleaner/Degreaser products already mentioned, then use one of the waterproofing paintable/crack isolation membranes already mentioned by @Craig Parsons, RedGard or Laticrete HydroBarrier.

This town is isolated from others and severely underpriced compared to it's west coast neighbors.

Only 67 pretty healthy, but isolation gets a lot of people, they might have to find what to do you know. 

But I’m happy now because I have a new (Coronavirus isolation) purpose in life.

Only you can answer that.You would want to look for KEY INDICATORS of what they are doing today and in the IMMEDIATE past to see current trending patterns.If something happened way in the past ( some call it young and dumb incident ) and it was an isolated incident then risk might be lower.If tenant demand is super strong for the area then maybe you do not have to take on a tenant that leaves you questioning whether to rent to them or not.No legal advice given.