Car transportation ideas in Germany, Austria and France

Two 71 year old American women, myself and my best friend (since 1970!) are planning a trip for ten days to trace family roots in Stein, Germany, Lech, Austria and Colmar, France. We would love to hire a private driver for the ten days, approximately August 21 through the 31st. We will probably do HomeExchange stays when possible, but in the interest of time would enjoy a driver. We are both seasoned travelers and in good shape. Any suggestions from the wonderful HE Community? Thank you in advance!