I think that harp is like any of instrument as far as player affluence is concerned. There are those that come from wealthy backgrounds and those that don’t. Most working professional harpists (freelance) would tell you that finances are a struggle, as they are for any musician living this lifestyle. Think of it in terms of pop stars: there are a few who make a lot of money, and a bunch that make ends meet… this is certainly true of harpists.
Small harps have become so reasonably priced these days, even adult beginners do not need to fall into a higher tax bracket than the rest of us. The instrument has become much more accessible in the past few years… but with that being said it is still extremely expensive and specialized.
I think that the harp is associated with money from an outside perspective only.