LOL now you got me thinking, motorized car rotisserie!

I think the most robust solution and of course most common, would be a 100:1 worm gear drive with a 1750rpm furnace motor (which I have) and a decent ratio pulley drive to run it all. Im sure I can find a reducer for ~120 or so.

I am however thinking in the future of adding an rc setup to the actually chassis of the roaster, that way I can just drive it up into my trailer and off to where ever I want, now that would be sweet!