You are completely wrong on the basic facts of this. The Crown Estate belongs to the state, not the royal family. The Sovereign Grant is an arrangement to pay t

You are completely wrong on the basic facts of this. The Crown Estate belongs to the state, not the royal family. The Sovereign Grant is an arrangement to pay the monarch is paid 25% of the revenue, which would otherwise flow to government coffers like the rest of the revenue. Were the UK to become a republic, the state would simply stop paying this to the monarch, and thus gain revenue.