The last really large drywall job I did was a basement at one of my houses and I rented a Porter Cable drywall sander for that job. Those used to be $1,200, but are now down in the $500 range. I started looking for one since the guest cabin will have a good bit of sanding. To my surprise the import market has started putting out their own models for a fraction of the cost. If I was doing this every day I'd probably go with the PC version, but decided to give the WEN version a try as it comes with both round and triangle heads for sanding.