How about enclosing the area outside the shop door and leaving the table saw
out there permanently? You could buy any saw you want (a big, honking
Unisaw!) and have more room to work inside.
A 6 foot door to an 11 foot shop is not stupid. It's practical for what you
want to do. It's not that hard to widen that opening. Some properly
installed 2x12 headers will hold the house up, and a 1 day rental of an
electric jackhammer will take that concrete out in no time. I've done both.