I always heard the 2 greatest days of owning a jet ski are the first day, and the day you finally sell it. I've had several people say they get old REALLY fast. Kind of like pools, get a friend/neighbor with a pool and a jet ski, now THAT's happiness.
I dunno. They say that about boats, much bigger than jet skis.[0]
Jet Skis are pretty easy to load/unload and store compared to a bigger boat. Also much easier to maintain, most of the jet skis I've ridden have all been small 2-stroke engines. Bigger than a lawn mower engine, but not as powerful as most motorcycle engines (except for the bigger wave runners, those are 4-stroke motorcycle engines). Like a go-cart engine. Yes, they require maintenance, but also probably the simplest engine you could possibly maintain.