According to Toro's website, the commercial Turfmaster weighs 167 pounds (assuming I'm allowed to post this link) :
Clearly, the heavy duty commercial components have added some weight versus the homeowner model, but I'm guessing that's still about half of what a 32" wide deck mower tips the scale at. By comparison, I think the 21" commercial mowers are around 120 pounds or so. I would also estimate that two Toro midsize mowers parked end-to-end would be about equal to three of Turfmasters in the same alignment. That could be a big deal for anyone towing shorter trailers.