Quantity   Component name
2 × mini 120VAC fans free!
1 × 120VAC power cord free!
1 × a bunch of scrap wood, bamboo flooring, plywood, etc free!
1 × plastic bags, I used the tough plastic from a large comforter/sheet bags free! not ideal, I should have used more plywood and screws and hot glue
1 × 4 or 5" dia drainage tubing, slightly flexible. free! although not ideal. (I would prefer a very flexible piece of ducting.
1 × semi-rigid 3" dia Al ducting less than $15 at lowes
1 × lots of hot glue, zip ties, exterior screws, small nails, a bit of wire, solder about $5 total, mostly for the cost of the hot glue...