Wow it's been 12 year since I saw a guy with a decked out wood shop in his toy hauler. They were full timers and he made yard art and signs. He did bolt everything through the floor. I recall he dropped the gas tank and water tank to get at everything. He used some large plates under the floor to bolt through. One item he had was mounted to a plate inside the garage then two bolts through that into a plate under.
He also added 2" of solid foam insulation on the walls so he didn't annoy the neighbors while camping. None the less the campground we were at wouldn't allow him to use it due to the noise, but he told me he'd learned to ask first and hopefully not be camped near anyone. He made some really cool stuff as a way to supplement his retirement income, but I think mostly to give him something to do.
Wish I'd kept the photos I had of his setup.