"You can get a bullet smoker for less than 100 bucks."
Exactly. That's what my Walmart link was, to a Brinkmann bullet smoker. And crap, it looks like the one I posted the link to is no longer available.
But, Home Depot carries a similar design from Master Cook that's very similar to the Brinkmann.
I had a Brinkmann for many years before it finally gave up the ghost. It was a bit fiddly, yes, and could be a bit difficult to control if it was gusty out, but I never had any complaints about the food that came out of it.
The only real problem I had with it was in the winter. It was very difficult to get up to temperature. A large cardboard box slipped over it, forming both shield and insulation, was the solution.