I don't think a food truck business is for the faint of heart and I would advise really considering the cost. Has your "kid" actually worked on a food truck? I would advise doing this for several months to get a feel for what it is all about. Few observations I have seen regarding food trucks. The trucks are expensive often as much as opening a small restaurant. Very limited prep and storage space. Either you have to have a separate prep location and someone who will handle prep while the truck is out selling. Or, you will have to prep in the down time. Storage seems like it is always an issue. In addition to this running a small restaurant on wheels you have to maintain a heavy Social Media presence. It takes a huge effort to run a food truck (more so than an actual restaurant in my opinion).