Slightly off topic about HD. I had HD come and give me an estimate to add a new AC and Furnace to my house (recently purchased, not moved in yet). The key thing I want to do is move the furnace in to the attic. This would require adding a small platform in the attic and new duct work for inflow, which is currently in the floors and not the ceiling. The house is 968 sqft, no basement and just one floor. They quoted me 15k-17k for the work. To just have the furnace replaced in its current position, it was 7k. Just doing some quick searches online, a furnace would cost about 1k for something that I would need. From tplumm, it sounds like HD is expensive.
When I was looking at the house, my real estate agent had an electrician come out to look at it. He said he could do the job, roughly for 3500, including AC and Furnace. Been trying to get in contact with him again, but he has been unreliable in regards to showing up to do an estimate.