What wet/dry vacs have you tried? One of those with a long hose (long enough so you can leave the canister on the dock -- buy central vac hose in bulk) was going to be my first suggestion. I love that setup.
I've just got a medium-sized Rigid from the Home Despot that has held up fine for 4 years now without any special treatment. I don't remember what I paid for it but I don't think it was much.
Last edited by lydanynom; 07-23-2010 at 10:55 AM.