And will testifie this in court.

Then if they made a big deal or were going to take you to court I would just refund it and move on. 

In other words, if the light with the glow ring is discontinued, or now costs 500% more than it used to, it would be unreasonable for you to replace like with like because the primary function of the object is the mirror and the light, not the glow ring, and no court would find in the tenant's favor if it were litigated (no one is going to litigate over a mirror). 

Also, Illinois typically doesn't see the big swings like most of the country when the market shifts. 

He's an out-of-country investor. 

It was a little tough investing in another country.

However, you can check to see if your county has a free court records search system.

My cash flow math isGross rents - 30% (vac, maint, and capex) - PITI (principal, interest, taxes, and ins) = true long term cash flow.I recognize that this math does not work in many areas of the country.

NE in the country

The US Supreme Court answered this in SEC v.