Hot fermenter on a roll
This was inspired by the janitor's mop bucket and was suggested by my homebrew group as an alternative to carrying heavy, hot, fragile fermenters. It takes four pieces of scrap wood, four inexpensive (less than $10) casters, and a $2.50 "milk crate." I suggest two fixed and two swiveling casters.
First decide if your fermenter will fit into a typical milk crate or one of the similar containers sold everywhere. Don't "find" a dairy milk crate behind the grocery store. Do get one with a flat bottom; self-draining is preferred.
To build the support, use half-lap joints to make a square base for the cart. Secure the milk crate with drywall screws, heavy duty staples, or nuts and bolts. Install casters and you're off and rolling.