Municipal Solid Waste (unrecyclable trash) has a negative fuel cost. We have to pay to have trash hauled away and landfilled, so why not try gasifying trash?
Besides cost, the advantage of trash vs wood, is that wood has to be chipped or pelletized for efficient gasification, requiring “jaw type” heavy shredder and high pressure pelletizer, because wood has little resin that works as the adhesive in pellets.
Trash is generally much softer than wood, much easier to shred into little pieces, and pelletize under much lower pressure, because trash has thermoplastics that bonds particles together when heated and pressed.
A truck could easily carry a “blade type” trash shredder and pelletizer, both quite small size, to feed trash pellets into gasifier.