The BBC cannot stop lying.
https://www.bbc.co.uk/news/explainers-57559653
This article about the cost of the royal family is good but it grossly underestimates the cost of the Coronation which is closer to 250 million when the security operation (which involved rounding up non-violent Republic protestors - a brutal piece of policing for which even the Met apologised) is included.
There is no figure for the benefits of the royals to Tourism but this is in any case a pathetic argument. Many countries which do not have monarchies have far better tourism than the UK so the royals are arguably a cost to the tourist industry.
If people want to drool over Buckingham Palace then they can still do so when Charles and his cronies are consigned to the trash can of history.