Was she also trying to sell you a sewing machine? Geez Louise so long as it sews a straight seam, and yes fits a walking foot, your good to go! Why didn't she like the extension table? I can't figure that one out , can you?
I often prewash my fabrics before they go in my stash. I snip the corners so they don't ravel so much in the wash.
I only use a bias binding when sewing curves, and I hate to admit it but I rarely hand baste. I use both 505 spray basting and I'm just starting with Elmer's school glue. Learnt this technique from this board.
It sounds like you have a pretty good handle on this quilting thing. I would take what makes sense to you from a teacher. Especially one who claims to be teaching beginners. The most important thing about quilting is to relax and enjoy it!!