Opinion Question - Would you add central air to a small rental?

[Chelsea Ziss]

We are about to start rehabbing our first rental - a sfh in an A-/B+ neighborhood. It is only 700 sq ft. We are currently under the impression that the furnace works fine (although we don't know for sure.)

My husband / business partner thinks we will need to add central air to command the most for the property. I don't really think it's necessary - we'd probably be able to get an extra $25 in rent, and while it's common for the area to have central air, it is by no means the rule. 

What do you think?