I believe that much of that is already spoken for. The point is that to change the direction of these waste streams, you have to prove to those hauling it to the dump that this is a better use ($$$). I remember a presentation at the Allegheny SAF where the presenter showed one of the problems with firing power plants with wood chips, many of the studies showing there were sufficient supplies did not consider the already existing plants. Overlapping catchment areas.
As for getting the gasifier to work reliably at these rates in excess of 500+ tons a day, that will take 5-10 years from the start of scale-up.
Everything I have read on Energy and Alternatives to Oil is that the return on investment of alternative froms never comes close to Oil. And I mean on the actual energy invested to get more energy.
From what I read, oil is 4:1 return on investment. Invest one unit of energy and you get four back. The Best any of the present froms of alternative fuels is offering so far is a 2:1 R.O.I.
However if a system can be put into place that rescues wasted energy (stuff that is sent to landfills and such) then I would surmise the system would work. That is "IF" it can be done so to be competitive financially. However I fear it will be setup as a feel/good Congressional endless moneyhole.