It is fortunate she was not introduced to a ten thousand dollar machine......
If you had a child who wanted to be a concert pianist, would you get it a grand piano to learn on?
That might not be appropriate in your situation, however, the desire and decision is hers to make. If she wants to sew badly enough she would sew by hand and be happy. Count yourself lucky. Along with fine machines comes the desire for the most expensive fabric, thread, scissors, not to mention a studio with all the cabinets...and then, there is a long arm machine where you would need a huge climate controlled room and pantographs and many cones of thread in a rainbow of colors. God forbid she should collect old machines also. Be careful what you encourage........................Lots of love.