If you've got the resources, you can pick up a vanilla-box food truck called the Mobi Munch for $125,000. The truck is an expandable/scalable food service vehicle that comes with fresh water, gas heat, and a place for food waste. You can even add on the optional restroom attachment.
The company has even launched an online portal
to highlight anything mobile-food related, so you might even get some viral marketing out of the deal. $125,000 is a pretty steep price, but compared to opening up a steadfast location it may seem like a deal.