Hi Josh,
For your automation, just get these cycle timers for your grate and hopper shaker. You dont want to know what I would charge for a full blown automation package. This system cost as much or more than some of our gasifier systems.
Use this controller to set up timed intervals to agitate your grate and hopper. If you are running a stationary system then this will be predictable and somewhat linear.
If you want the AFR system there is DIY thread hear on the forum. If I were to build this system alone you are looking at $1200 bucks just to give you an idea. Guys I hire to wire and build this stuff are expensive; it takes a couple days just to build and wire one of these boxes. These guys get $25 to $30 bucks an hour plus the $400 in parts and material’s cost and then our margin.