The dish in my photos is a plate of pork foot meat and rice, comes with spicy hot green sauce and a tiny bowl of broth soup, for only 30B (about US$1), same dish costs more than double elsewhere in touristy areas.
The place is very humble, located in front of a house or shop in a big clean (by Thai standard) alley.
Next door sells bananas very cheap, a bunch at least 1kg can be as little as 10B (about 30 US cents).