Yes, it is possible (and pretty fun) to drive a 16' cat by yourself. There are plenty to choose from at reasonable prices, and with a minimum of maintenance, will provide tons of fun!
There are a few finer points to sailing a cat vs. sailing a monohull, but nothing that's too much to handle in light to moderate winds.
I'm usually away from Stuart racing, but would be glad to offer what meager assistance I may have if you would like.
Where do you keep your boat? Where do you sail?
I'm usually putzing around in the North Fork west of the Roosevelt bridge.