I would suggest either a mid 70s Kenmore 158-xxxxxx series machine or a Singer 201. For what your friend is doing I'd lean more to the 201 than the Kenmore if she doesn't need ZZ or decorative stitches. Lots of work room under the arch, a good strong running machine that will do most ( not all, but most ) anything needed.
Now, if your friend wants to drop the coin on a Sailrite and can afford it .... she should go for it. I have read several reports on them are all were good. I want one for myself, and have bid on two on GW auctions. Was outbid every time though
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Now as for the binder attachments, I have several we've bought and they are far easier to use than doing binding the old way. Those I have are designed for industrial machines, but will fit any domestic machine with two mounting holes in the bed.
We talked about them here: {
http://www.quiltingboard.com/vintage...s-t230501.html }
And Vridar can tell you and your friend about the walking foot machine he's got. Not a Sailrite, but it's kin.
Joe