You are right, the Tacsew is O.K. for a guy doing one or two interiors, but doing it for a living is a lot different. Thanks for sharing. The Tacsew is a clone of the Consew 206, which has been made for quite a few years in China. Even the sewing machine stores will warn you not to buy the newer 206s for that reason.
No one lives forever, the trick is creating something that will.