What has to be replaced or repaired, apart from the new unit? What shape is the ductwork in, what about insulation, and windows. What about piping for refrigerant and condensate? What of the electrical wiring, grills and registers on the floors and walls, filters before the furnace and evaporator coil and it’s condition and cleanliness? Consult with ProSolutions for an accurate assessment of your present air conditioning system.