Good idea, and unique enough to be interesting to a variety of people. We make pork potstickers that are not that labor intensive if you have have a helper when assembling.
If you do buy a food truck , check out Pork Chop Johns at the link below. These guys have a restaurant in Butte, Montana and on the home page are some good service photos of their signature pork chop fritter sandwich. But here is the deal.... click the 'Wholesale' link (it has a couple more photos) because they describe the pork fritters in great detail, and sell them in 50 count boxes to individuals, restaurants and food trucks. It takes 3 minutes to deep fry them, and about 90 seconds to build a sandwich. A local food truck sells them, sloppy Joes, and ham sandwiches (the pork chop is the top seller by far). I don't know what the wholesale price is but the local food truck sells sandwiches for $6.50 and you can pick lettuce, tomato, pickles, onion, mayo, mustard or hot mustard.
porkchopjohns.com