2012, 58k, $30k, SRW, Dump, plow since we're on the subject of plows at the moment... https://philadelphia.craigslist.org/cto/d/2012-mitsubishi-fuso-canter/6295195121.html
You could certainly stay stuck for a while and survive with that much fuel on board for sure. Congrats on the build. I appreciate hearing your thoughts on your build.
Not sure of the laws in AUS however if it were me I would ditch them altogether and go with something from these guys: http://www.jwspeaker.com/products/categories/headlights/