I've seen some beautiful sewing set ups but none with the portable sewing tables. Is anyone using them full time? How stable are they? I don't have much room and I want to have a table where I can adjust for my machine and have a level work surface. The cabinets that have that feature are probably $100 more and I don't know if I can trust the quality. I'm trying to keep this as cheap as possible so it doesn't eat up the what I've saved for a new quilting machine. Thanks for your help...Esther