Please recommend books on 19th Century wealthy Americans

I’ve read quite a bit about the fabulously wealthy and the Robber Barons. What I’d like to read now is a non-fiction book about the everyday lives of wealthy families in 19th Century America, those who didn’t need to work and had servants and palatial homes but who were not quite rubbing elbows with the Carnegies or J. Pierpont Morgans.

Can anyone recommend a title?

Thanks!

I liked this book so well that I am going to recommend it even if it does not exactly fill your criteria.
Fortune’s Children by Arthur T Vanderbilt II
The Vanderbilts did rub shoulders with the Morgans and Astors. A very good book