I made my own installs bench years ago, and did a couple of builds - one an ultralight version - not so long back, videos
here and
here. The advantage of a bench with legs attached vs eg a Bora centipede or MFT top on trestles is that you can pick it up and move it around easily - something I found I needed to do frequently on an install as you’re always tight on space.
The problem with the Festool MW1000, Tim Willmots MFTC and any of the other mobile workbench things on wheels is that they’re great on the ground floor, but you have to strip them down to get them upstairs - which is how I ended up making my own.