So dr. dave, care to share 1) how much work it actually is to live on a cat and 2) whether one could do it by himself?
Asking for a curious friend ..
Living on board a catamaran is about the same amount of work that it takes to live anywhere. If you live in a house that is in a poor state of repair, you will have to put lots of work into the house. If you get a boat in a poor state of repair, it will be a lot of work to get it up to speed.
If you are never going to sail anywhere offshore, the boat does not require the same level of preparation, hence, less work. If you are going to sail across oceans, you have a lot of work ahead of you to make it ready and safe for a world cruise. Most sailboats sit at the dock, and those who are living aboard are not going to do much work to their sailboat.
How much work is it to sail on a passage?
That depends. It took me 16 days to sail across the Atlantic and 21 days to sail from Galapagos to the Marquesas of French Polynesia. Somebody has to be awake around the clock to run the boat. If you have four people on board, it's a piece of cake. If you have two people on board for those long passages, it become more arduous. If you are single handing, you get out of the shipping lanes as quickly as possible offshore, and you do the best you can. You hope that you don't get run down by a ship when you are asleep outside the established shipping lanes.
Anything under 40 feet in length can easily be set up for single handing. Sail size is manageable and anchoring easily doable for a single person. That being said, unless you are a real loner, it probably is not such a great idea. Some people get a little crazy when they are offshore alone for a couple of weeks.
I have known a few single handers and they seem to be happy with their choice.
If you have a new boat, you have about a five year grace period before major systems require significant attention. A new boat is clearly less work.
Just to give you an idea, I am heading to Florida to do a major refit on my catamaran that will take three months of hard work. Then I should be good for the next five years.
I hope that answered your question.