After burning grain for a number of years I was looking for a boiler that would burn a cheaper fuel. The ability to burn bulk wood chips is what sold me on the Bio-Burner. Have you seen the price of corn lately?
Burning solid fuel does take some effort compared to gas. You have to feed and clean the unit at regular intervals. Saving money while burning a renewable fuel, and not being tied to a single fuel source that fluctuates wildly in price, make the extra work worthwhile.