For my second machine, I bought a desk at the thrift store and cut a hole in the top to insert the machine. The machine actually sits in the centre drawer. The plastic table extension that was with the machine (legs off) butts up nicely to the machine to give a nice level surface.
I just used a small student's desk but if it were my main machine, I would look for a large (oversized even!) desk to convert. You can often find those at 2nd hand shops and the like at a very low cost. You may even be lucky enough to find a whole office set of desk and cabinetry and you could be all set.