. $1,200 to $3,000.I don't do major electrical work or major plumbing, however I will install new hot water tank and new air conditioner unit and or heating unit only if needed.SO therefore on the low side my quick estimate is $8,400 and on the high side $31,000

If you're not setting aside that CapEx money youre going to be hurting when three of the air conditioners go out at the same time. 

Milton,How did you make out with the mold condition?Es

There used to be an air conditioner in the front window, junk in front of the house and over the lawn, and at one point people screaming at each other in the yard. 

How often do you have to rewire a property just to add a window air conditioner?

I am prepared to go through closing if they can make the air conditioner work. 

After that, you can get prices to install individual water heaters, air conditioners and call the power company about putting in the extra meters.You can generally put a price to everything.

Air conditioner is over 10 and for expense planning purposes we can expect to replace that within 5 years. 

Post some of your numbers including your mortgage, property insurance, property tax, rental income, sewer use fees, trash removal, vacancy rate, cleaning between rentals, air conditioner repair, etc..

I have recently had a tenant need work on their air conditioner.