How rich is the English royal family?

A lot, the Queen (not The Crown) owns the Duchy of Lancaster, areas such as urban development, historic buildings etc. With the Income from the Duchy of Lancaster (about £400 million) And with Tourists from US ect, visiting the palace, it makes her wealth around £600 million. The Average upkeep of the royal family is about 67p from each Briton per year, that's a tiny amount to ask for and I don't see why people complain so much.