Buying a boat to live on?

Although I don't have much experience on the water I recently got this idea of wanting to buy a boat to live on. 
At this point it is only an idea, and not even sure if it will be possible financially, or if I can actually do it at all.
Maybe if I write it down and post a video as a reminder I can force myself to look into it a bit more.

Had a look for what's for sale and the prices. Pretty shocking how fast prices for ships go up to ridicilous heights.  
But fortunately not all boats are out of range, and with a bit of luck can even get a pretty decent one for as low as 3-4000.
I'm not planning to go out on the open ocean, but would like something capable of sailing along the coast.
Just orientating right now, watching videos, trying to figure out if and how I can do this and not fail miserably.

My friend bought a boat and lived on it once...he loved it and was very cheap but
suddenly the mooring fees and some other stuff like insurance went up dramaticly
and he couldn`t afford it anymore.

When I was a kid I also had a friend who lived on a houseboat, always loved to go play over there.
He used to be a real boat man always traveling on ships and he was a semi professional/hobbyist sports rower.

Quote :

...suddenly the mooring fees and some other stuff like insurance went up dramaticly

This is maybe the most tricky, all those rules and regulations. And for every country or dock the rules are different.

Money can become a problem like you mentioned, and extra costs for maintenance and repairs can be higher than expected.

While looking around on youtube I came across quite a long list of things to consider when living on a boat.
Not all negative, but good to know about in advance.

Maybe I got a bit overenthusiastic with my idea, and now I'm trying to find things that make me reconsider or forget about it.
One of the things I found that could be a problem is the communication, seems important while navigating rivers and tight spots.
Although it seems a radio is not required on a boat. I have no radio license, so I'm 'officially' not even allowed to operate a boat radio.


So far I'm still quite fond of the idea of not paying rent and electricity bill, and the abillity to move around, living as if permanently on vacation.