Are you looking to do a whole pig on a rotisserie, or just a chunk of meat now and again?
If you're not in the food business and are not looking for a whole hog cooker, check out the cajun bandit for the 22 inch weber kettle or weber smokey mountain, or the kamado bigjoe rotisserie.
I'm pretty sure Spitjack is near you and they make whole hog rotisseries for putting over an open fire. There are also some other brands, and you wouldn't have to spend 6000, plus I've seen them at parties and they're a hit.
The cadillac smokers don't look bad, but I have heard zero about them on this forum, so I wouldn't wanna drop 6 big ones on a company that I'd never heard anyone on this bbq forum mention once (maybe i just have a bad memory though).
Also- a lot of the previous brands mention that do custom work would be able to handle rotisserie as I'm pretty sure I've heard of them doing so in the past.