re: Preliminary ideas

A lot depends on the kind of work you do. If you only do small stuff, then maybe your idea would work, but if it’s bigger stuff you do, then the option of rolling machinery around is attractive.
I don’t do small stuff. I have a (lovely) bench that I never use – it’s just a dumping ground. My work is done on an assembly table with a sacrificial mdf top, and that is on wheels, incorporates storage for mitre saw, powertools being used on the job, toolboxes, cutters, all sorts.
The thing that springs to mind with your set up is the max length of any cut or bit of jointing will be the distance to the wall, but if it is only small pieces you are working, it might work out for you.