As this thread has illustrated, it depends what kind of wealthy you want to look and where you want to fit in, and for what purpose.
I think often words like 'wealthy' and 'classy' are used to mean 'I want to look 'better'' and given we don't know how you look right now or what you feel insecure about, it's hard to give advice.
I don't hang around in the countryside so none of the advice about fitting in with the rich neighbours would work for me, I have hung around with some of these groups and it's not my style at all! That's not because I'm not styled right, though, it's because I'm not a wellies, riding, quad bike type of a gal and don't want to spend my time on those activities.
If you need to look wealthy to fit in with HNWI clients, that's another whole thing.