First of all, your restaurant is remote and has some limitations. The main customers are local or passing through local diners. The cost-saving promotion method is to look at the most popular local portals, do forum promotion, and let your restaurant know about it among local people first. In the early stage, you can take some preferential and limited-time free activities to attract diners and do a good job in word-of-mouth publicity. Well done, the basics will soon be slowly spread by the circle of diners. But the cost of the activity needs to be measured and considered by itself.