From what I've seen. For a liveaboard to get underway it could take a couple of days to get things put away or secured for sailing. not mention the cable tv, the electric, the water connections. On the other hand it's really not my business why people do what they do. I'm sure there are people that think me getting a sailboat this late in life is odd.
I'm 56 and just bought my first sailboat...a 72 Aquarius 23. I love it! I wish I had a pond in my back yard so I could put there and sleep on it every single night!!