Space Requirements
The minimum machine room length is 6.5 m (22ft), ideal is 2x the length of the longest board you want to make plus 1m, 2.2 m (or 7.2 ft) wide and 2.2 m (or 7'4") high.
The adjoining control room
does not have to be big, just big enough for a computer and a little
desk. This control room should have a window to the front of the machine
but this can also be done via camera (not really recommended).
A possible, and common, layout of the machine and the control room (click on pic to enlarge)