I measured last night and the longest wall without a window is 190" (but the door opens up against that wall), that will fit the longarm just fine. The other long wall has a window that I think I'd like to have the sewing table in front of for light. Another wall will fit my Ikea cubbyhole unit, another one would be good for a design wall.
I need help moving the longarm and a huge armoir but my son stops by sometimes on his way home from work so that won't be a problem if I just find out what day he can come by.