No problem. If the Singer has reverse, it would be a huge bargain, and then you could spend $200 on a good servo motor like the Sew Quiet 5000.
Personally, the Pfaff 1245 is what I learned on and it is a great machine at a very fair price. There are $200 worth of attachments that come with it. That is the one I would choose. The Pfaff is a Cadillac, the Singer is a Chevrolet, and the Tacsew is a Honda Civic. The only bad thing about the Pfaff is that parts for it are expensive. The good thing is that it's very unlikely you'd need to ever have it repaired, they are built like a brick shopping center.
No one lives forever, the trick is creating something that will.