Bio-fuel for all the hype and politics is a niche market in the North American continent. It is damned near impossible to compete $/btu wise with our current power net work. A commercial compressed fuel plant of a very basic nature $150K that's just bio equipment; no packaging, transport, storage, or processing faculties (buildings). The plants that are operating are primarily concerned with shipping 90% of product to the European side of the pond. Even with the various programs of Gov. subsidization it is difficult to achieve a self sustaining profit margin.
I my limited opinion the only area that has a marginal chance at success is a compressed brick fuel plant. It does not help that the wood stove industry has taken a negative attitude towards compressed wood fuel. On the other hand compressed bio-mass combined with various polymers is enjoying a good bit of success in various markets. Here again the the start up costs are nothing to sneeze at. Generally those that are making it are an off shoot of the core business in a related field.
Note: A chipper, horz or tub grinder outputs must be reduced to a consistent 6mm or smaller particle size for use in a fuel pellet or brick plant. This would require and additional granulator unit. Also the moisture content of the raw material must be strictly controlled. Generally this means some sort moisture removal process must be used ahead of the compression stages. A pre heat stage of the raw material can serve this purpose as well as being beneficial to maintaining the proper temp of the die/mold, post compression stage requires a cooling of the product prior to packaging.