Dating is really hard, anything that makes you weirder and means you'll be around fewer people is probably a bad thing. Plus living on a boat and being near all the salt water probably won't be good for your skin, which will make it all even worse.
I'm a transportation cyclist who went car-free while I was single in a car-centric inland US city, where "not having a car" is generally seen as being completely irresponsible, not having your shit together, and not being a serious person. I still dated people with the normal frequency, eventually got married, we now have a one-car household.
If you love your lifestyle, and think it's worth doing, and aren't a huge burden on other people, then other people can appreciate what you see in it too.