While food trucks and the concept of selling food in a mobile vehicle, have not taken a big stride in Bangkok and other parts of Thailand - Thai food sellers are beginning to understand the benefits of vending in a food truck. However the concept of a food truck might not be advisable or feasible in all cases. The initial cost of buying or renting a food truck or food trailer, the locations available to park the food truck, the cost and availability of electricity connections (if needed) need to be considered.
This report provides a deeper insight into the world of food trucks: https://www.saw2day.org/food-trucks-trailers-thailand-01-0921.php