I am in the process of purchasing a vacation condo in Southern Florida which needs a new air conditioner. Current unit is 24 years old, so not much sense in repairing. The condo is 1000 sq feet and won't be inhabited most of the year, so I don't want to spend too much money, but do want a reliable unit. One heat/cooling company suggested a Comfortmaker 13 seer for $3500 does this seem like a good fit? Would anyone recommend something different?