There is a food truck that recentyly set up on my route home from work (I take different routes to and from because traffic). We have yet to investigate further. Aside from the "Asian Caravan" (I can't remember if that was its actual name or if that's just what we called it) at uni the only times we regularly hit food trucks is at festivals/shows but that's been almost every year for the last few years as we've been performing in at least one every year. I don't know if they are actually expensive or if it just feels that way because of our budget but we're super fussy with them so have so far always managed to pick really great ones.