replace HVAC or not?

[Scott C.]

I recently looked at a 1996 singlewide MH and found out from the neighbor the HVAC unit didn't work. I deliberated too long about what to do about the problem and the unit sold before I made a decision so now I have some questions about how you all would go about the situation.

The asking price was 5k. Most of the people in the park were paying about 350/mo for just the house so at 16% int and 48 mos gives a price of ~12,500. My HVAC quote was about 3k for new A coil/heat pump/condenser installed. I would've had about 7-8k into this house if I had bought it and put in new HVAC so my question is would you have: 1. put the new HVAC system in and increase the # of years of the note for a higher price 2. put window units in and charged around 12.5k or 3. not put any money in and just sold it as-is for a cheaper price? Also, what percentage do you require as a down payment? Is it reasonable to expect to get atleast 5k down from a buyer if I offer financing?