Hi and welcome to the board. Feline fanatic and the others all gave you great advice. Some have mentioned a vintage machine. I would also suggest one. You could get a nice vintage 301 or 401 to quilt on for not a lot of money. The 301 has 7 1\2 inches of harp space, which is good for a little machine. But its metal gear driven and a work horse. I have one on a frame and it gives me beautful stitches. I would stay away from a new Singer. Brother machines are still made by Brother and are better machines, if you are buying new.
I wish you good luck in finding the perfect machine. Gina