I really need to get a better idea of what that number might be, and good point about including it in my vacancy calculation!

Having AC would make it a more desirable property so you may have less vacancy or appeal to a better tenant pool.

but I am expecting more cancellations and higher vacancy unless we reduce our rates.

For the electricity, I wonder if there was a vacancy during the increase?

That said vacancy is the killer of cash flow ....so do some math on how much vacancy you can weather, how much it would cost to get the unit rent ready  and how much you would need to increase the rent to cover that cost, then decide  

In the unit next door, one of the tenants was already practically living with her boyfriend and was willing to break the lease early, paid for all of March and actually moved out in early March giving me the chance to do some minor upgrades, have showings right away and get it rented to limit vacancy.

Vacancy rate from what I’ve seen is close to 10%.

@Christopher Olsen Make a spreadsheet of the MSA trends over the past 10 years like: vacancy, job growth, population growth, job diversity, supply & demand, taxes. 

To my knowledge, which may be outdated, a lot of companies have left or are in the process of leaving Hagerstown which results in high vacancy rates in office buildings and in turn affects MF/SFR property values.

Vacancy will be sky high.