Just a silly suggestion which I haven't really thought through:

By analogy to the circular saws on the wall they have at B&Qs, if you are short of space could you mount the bed of the machine vertically? - essentially screw a normal machine to the wall. It would mean you would have to think about how you clamped things to it slightly more carefully but once they were clamped I don't see why it wouldn't work as normal. And if you were mostly working with sheet materials they are often easier to handle vertically than horizontal.

I guess you might need some form of brake on the Y axis as it might otherwise fall down if the power went out for some reason, and you may need a beefier motor to pull all that mass uphill.

Anyway I am sure there is something I am missing as I haven't seen any photos of this configuration.