In an urban environment you don't have
alot of space for a 500 lb. gas producer unless you are at a community waste facility. If you where a contractor building houses you have wood waste and you are allowed to be messy and make noise. That would be the sweet spot.
Like Kim is saying, for cooking and power outage purposes you can make little woodgas camp stoves that will take up the space of a
coffee can. That is your best best.