Tired of tending your barbecue for hours and hours and hours? Maybe you should build a self-tending model like the one that Nathan Moore submitted to the Popular Mechanics do-it-yourself rally. It doesn't look too difficult, given the interview and the drawing. If I ever upgrade to a wood-fired smoker, I'm tempted to build one of these. Or recruit a friend who knows something about mechanics.
As a side note, look at how Moore refers to barbecue as a synonym for slow cooking. Not fast cooking on a grill: That's called grilling. Grilling. Barbecue. Grilling. Barbecue. (Pilotless Drone.) These are two vastly different cooking styles. It's not a barbecue when there's a grill; it's a cookout. (My co-workers once changed the name of our company's "barbecue" to cookout, just to avoid hearing me rant about this topic. I call that a victory.)