Dryer....
So I'm assuming that the dryer does not have an outside vent? Your installation sounds relatively easy, as long as the dryer is not TOO heavy, and there is room to work. Looks like a 2-person job to lift and install, although I've installed kitchen cabinets by myself.
For a while, long time ago, I had our dryer vented indoors, with the pipe leading into a water bucket. The cold water in the pail condensed the moisture and lint. Of course, it did not condense ALL of the moisture. Not a good idea. In the winter, condensation would be everywhere (especially on cold closet walls); in the summer, way too much humidity in the house.