How much does Window Unit A/C hurt your rental prices?

[Steve Balinski]

Hello everyone, there is a duplex in the NorthWest Chicago suburbs that I'm very interested in, listed for 250K, rents total for about 2500-2600/month combined for both units.  Its a complete remodel (don't know about electrical/plumbing yet), building is 100 yrs old.

My only concern is it doesn't have central A/C, would have to get window units.  How much does this effect the $$$ monthly rent you can charge and hurt finding tenants?  Its a "C-class" neighborhood, average home price is probably around 250K, older smaller town.  

[John Warren]

@Bruce Woodruff and @Scott Mac you have to be careful with mini splits in Chicago since the temperature can get below the operating minimum for these systems to heat.... maybe if you are using it as a supplemental heater it would be ok? I did some basic research into these a few years ago and decided to take a pass. We had a really fun stretch this year where the temps were below zero for about a week.