I have a Brother SQ 9000 I bought at Wal Mart several years ago. Only difference between a Brother machine from Wal Mart and another store is the price.
As an example.........When I was looking for an embroidery machine....Brother PE770 online from a store in New York vs. the LQS 25 miles from my house was a price difference of $600.00 for the same exact machine.
Brother does not make two of the same machine.......one made cheaply and one made "with better parts" to sell at different stores.
My SQ900 came with more feet than I can ever use. I didn't have to buy any extras. It does everything I ask of it. Those $2000.00 and up sewing machines can go haywire just as easy as the $200.00 one from Wal Mart.