I agree, Thomas's barrel design would be really "legit' . And I still like my bin on ground.
And I like how Chip's barrel gets away from the axle problem, but also wonder how to get the stuff out.
There's just no way around compost taking a certain amount of time and/or direct human management to try and reduce the time. With time reduction meaning less space devoted to unfinished piles of compost.
Entrepreneurs exhibiting the classic- "there is more to things than you would think, when you know nothing about something."