this is more directed at sean since his father does this sort of thing.

sean, can you get an idea of what the hvac and duct work will cost? i'm completely open to exposed duct work and i think i've read that the bigger the duct work, the quieter the system.

perhaps your dad has a system and duct work he would like to donate

i'm working on a spreadsheet list that i will post soon of materials. perhaps everyone can look over it and add or subtract to it.