It is likely caused by condensation resulting in moisture.

The areas that are on the news on a daily basis are very condensed and are not a good representation of the Chicago area overall. 

I would agree with everything that John said in the previous post, I have clients looking to rent by the Lake, (neighborhoods like Lake View and Edgewater)  then  busy and condensed areas with a lot of things to do (like Boystown, Bucktown,  South Loop,  Andersonville) and also areas which are close to universities are always hot for tenants (Loyola Rogers Park / Northwestern Evanston, Hyde Park, Little Italy, Southport Corridor/ Lincoln Park)

Or hire the sub that figures out it only needs a new king valve and freon and fabricates a custom replacement condensation pan in his shop for $1K?

I would like to keep going down weekly until I can find a new home for the cats and have condensed all my belongings.

I know its very condensed but I was wondering if I have the right idea.Thanks!

The air-tight windows get condensation on the inside glass, to the point where it is dripping from the bottom of the window inside the house.

@Jonathan Perez I'm curious as to the nature of the leak.... if it still operates, you just need to manage the condensation.

I have some spare window units for emergencies, but I also replaced the AC condenser and A-coil on two MHs I put in last year with new units because after discussing the units with my HVAC guy we didn't feel they would make more than a year or two and they used the old refrigerant anyway. 

I’m assuming by cosmetic you mean that you are not ripping out walls so you have duct work where you add a condenser, decent electric, Sheetrock or plaster in good shape, plumbing you can keep.