This is a small guide for finding Ron Staples, he is a special vendor NPC. Ron Staples can be found at evening/night behind Museum of Freedom at the cooking fire. If he is not there, you can travel back and forth until he spawns. If you can not find him, check the video in this article.
Currently there is a bug that makes him never arrive at your chosen settlement. This happened to my second character. Nothing worked, waiting or fast travel didn’t make him appear. Though my other character did not suffer from this bug.
A requirement to be able to build a level 3 restaurant you need both Local Leader 2 and cap collector 2 perks. If you then assign Ron Staples to your food & drink store(restaurant), it will become level 4 and give you access to special items.