I know people who have done the Delta Queen cruise back in the day. Very relaxing but crazy expensive.
Yep, very expensive. My wife and I with our four year old daughter rode the Delta Queen for a few days. My sister-in-law was a maid and relatives of the crew could ride for $10 each per day in unbooked cabins.
We were treated like full paying guests who were paying $180 per day each. That was in 1975 when we bought a new car for $4,000. $360 per day would not have been a consideration.