Check this thing out. For sale on Ebay. It might be good for large porty jobs.....maybe.
https://www.ebay.com/itm/Carpet-Cle...496827?hash=item3d628e483b:g:zwMAAOSw43Ba5lEz
https://www.ebay.com/itm/Carpet-Cle...496827?hash=item3d628e483b:g:zwMAAOSw43Ba5lEz