I don't have a top of the line machine. I could afford better but have no need for all the bells and whistles. Many of those features I would never use. The things most important to me are, needle down, a drop in bobbin and a 1/4 inch foot attachment. She may just need her old machine serviced. But the cost of thaat is getting quite expensive. You may be able to find a nice machine at Joann's on sale.
Let's keep her enthused about quilting. It is SO MUCH FUN.