We have a small hot tub, the awesome thing is you can hop in anytime. Have an ozonator bubbling the water, other than a few bromine tablets every few months, almost zero work and 100% pleasure.
A tub that takes around 2 hours to fill, then requires tending the fire for another 2.5 hours, half a day later you get to hop in..
Crazy, takes the usual description of a boat as "a hole in the water you pour money in to" to a new level.
That said, I'd love to be invited along for a ride after the owner's servant prepared the tug for a cruise :^)