describe how a manorial state was self sufficient
Answers
Manors in the Middle Ages were largely self-sufficient out of necessity. With little travel, and most feudal land not being near a significant town that could supply workers (which would have to be paid), manors were dependent on what they themselves could produce.
Usually a manor (by which I assume you mean a significant tract of land held by a lord, not just a manor house) would have people who could do most jobs, such as blacksmith, farrier, miller, etc, there was likely someone who lived on the manor who could provide the service, likely in return for some reduction in the goods and services he owed to his lord. For precise work, such as making a new suit of armor or building a carriage, a lord would go to an expert, who would likely want to be paid in coin, of which there was little in circulation (at least in the beginning of the Middle Ages), but for most things, they relied on what their own people (or perhaps those of a neighboring manor) could provide.