I enjoy working for my wealthy clients.. They are usually normal minded people, who have done well for themselves and I always usually get good advice, or learn interesting things I didn't know.. I have had a handful of "wealthy" clients that were very hard to deal with and were quite unreasonable.. It happens, and you cant do much except move on if you cant work for them..
Wealthier clients in my opinion, look for a company that looks higher end with everything from equipment to how they dress, to the literature they use, and believe it or not how clean you keep your equipment trucks etc..