Tom,
I finally got those pictures uploaded.
I built this "cabinet" 8 or more years ago.
It is 4 feet wide and 2 feet deep to accommodate the saw and is made from MDF.
I built a torsion box as the base and mounted locking casters. think MDF honeycombe-various 3 inch pieces slotted, glued and biscuit jointed inside the torsion box then face biscuit jointed and glued to the top and bottom of the box.
Then I built the cabinet on top of that! (BTW an MDF torsion box is massively heavy!)
I developed the pigeon-hole design around the planer and the welder purposely leaving space for the router. Years ago at the hardwood store I bought a delta add-on table (that is the top to the left of the saw. Shortly after that a friend had a unifence he didn't want any more (score!)
I put in a "Dust drop" under the saw, unfortunately a contractor's saw is so open I don't seem to get enough suction to pull all the debris out of the drop, but I do get a good down-draft when running the saw!
I purposely did not pull all my crap valuable commodities (like the motors) out of the way on purpose so that you can see how sturdy that torsion box is. No separation and VERY little if any sway or bowing to the cabinet! I have stood on it before and it is extremely sturdy.
I made one for my lathes it was 8 feet long and did have some sway. Unfortunately we damaged it in the move 4+ years ago. One wheel fell off the "Tommy-lift gate" of the moving truck and it was simply too much weight for that kind of jolt.
I hope this is of some inspiration to someone.
To me the best part about it is the versatility of it since you can make it exactly what you want to suit your shop (garage in my case) and the tools you want to put in it!