Heating and Air Installation (no current ductwork)

[John Enochs]

I have found a deal that I am interested in - a 4 flat (including basement and attic) that would have good cash flow.  The one thing holding me back at the moment is the fact that there is no heating or air, something that I would want to add if I made the deal.  I've never done heating/air before, but am fairly handy and believe that I could do some of the more basic tasks.  I was wondering if anyone has done this, how much money they were able to save through the tasks that they completed, and an estimate to how much this might cost if I used a the most cost effective methods (have seen estimates of anywhere from 5k-15k).