Check out the Weber Smoky Mountain Cooker ($180) for home (non-production) use. Charcoal-fired but a dream to use - the next best thing to "set and forget."
I just did a rib cook and I spent less than 20 minutes monitoring/adjusting over 5.5 hours. Other users regularly smoke
brisket overnight, able to leave it unmonitored, unadjusted and un-refueled for 8+ hours.
Far and away the best charcoal smoker on the market. I'd agree that an electric unit makes more sense for serious poundage restaurant use or cold-smoking.