Only wear what you can afford though, as don't go out of pocket for a member of a stuck up family who give their distant relatives and their spouses free mansions, while many can't afford to heat their homes.
I expect the royalty will be too busy thinking of themselves than worrying about what others are wearing, if you're worried about them.
I often buy 2nd hand clothes online such as e bay, if you want to be thrifty.