One thing that's often said about the Royals is they don't cost us much. For example, Prince Charles supposedly earns a lot from his estates and doesn't receive money from the Civil List. However, if you're a republican, isn't all that land really "ours"?
If we were to become a republic, what would happen to all that land? Would it just go to the government?
PS, this is a thought experiment, I know the chance of becoming a republic is similar to that of Leyton Orient winning the Champions League.