Value of central air in multi-family

[Account Closed]

I'm thinking about adding central air to all units in an 8 unit apartment located in St. Louis. Currently everyone has a few window AC. Would adding central air add value to my property? How much? Based on the location, I should be able to get $6000 more per year (bumping rent up as leases renew). It would obviously take a few years to get there. Any ideas or advice appreciated.