A company that doesn't treat the study as a one and done. 

Others may see or treat cleaners as simply hourly contractors.

This was while I was being treated for cancer.

Treat them as part of your team and they will treat you well. 

If you want to be very safe, I would recommend meeting with staff of the zoning department and confirming with them (in writing) that it is being treated as a legally non-conforming two family.If you cannot confirm that it was legally created as a two family prior to the zone change but you feel it is a really good investment, you take a little bit of risk, particularly if the town or city will not give you any confirmation that is a legally non-conforming two family.

As a general rule of thumb, you should treat them honestly, fairly, and equally.I don't buy my tenants cards or celebrate their anniversary or put flowers on the counter for their move-in day.

There is an actual entire department of mathematics called Proof Theory.Proof theory is where you can take theories, concepts, and statements, and treat them as actual mathematical objects.

Easiest thing would be to find good, solid tenants and treat people how you want to be treated.

Would just remind them that they will be fined if another tenant complains and they will be held responsible for any costs to treat smoke damage when they move out.

Louis personally, but Chicago has treated me great and we have properties both in the city and the suburbs.