Oh I didn't answer you on the tub size. If your weight is accurate, I'd probably recommend a 32 quart tub for now. The largest he'd need is 41 quart. Just go to Walmart and look for a low tub (like 6-7 inches tall) that is 32 quarts, as I don't have measurements on me. But the labels on the ends of the tubs tell you the size. They're relatively inexpensive, so upgrading to the 41 in a year won't be a hardship.