yeah, if you are set on totally submerging kegs and the like, I would go with a plastic trash can. I use these tubs from walmart (menards, home depot, etc.) If you watch, you can find them on sale for $5 or $7 from time to time:
http://www.walmart.com/ip/Mainstays-Rop ... e/19400074
I like to have a tub of star san on hand. I brew a lot. And, I keep the tub of starsan for a month or so (checking pH.) I put 10 or 15 gallons in it and it is perfect for throwing in all the tubing, bucket, odds and ends I need on brew day. Just reach in a grab what I need and I am sure it is sanitized. Also, with bottling buckets (which is what I use for fermenting), you can put them in right side up half full, then put the spigots together and in under water to keep them sanitary, turn the bucket upside down in the water and sanitize the rest. you can put enough bottles in one for a full 5 gallon batch. All around, pretty handy (and stackable if you have 2 or 3). Also great for filling up with empty gallon water jugs when I go to get RO water at walmart. Great for dumping grain into and hauling out to garden, etc.