Your dream can become reality. Many have done it successfully, and many have jumped in and decided it wasn't what they expected.. I surely don't know how one figures that out ahead of time.
Unfortunately, it WILL be an expensive lesson if you decide to backtrack and go back to land.
I love living on the boat and working ashore. I was able to breakaway and explore for awhile, but had to come back to the mainland for work. Subsistence sounds easier than it is. Hard to really find work outside the US.
Space and reduced clothing
and material stuff is the biggest issue. We decided to keep a small mini-van as a closet for our work clothes.
Our two boys don't seem to require much space at all beyond their bunks. they have all the game/video gear
Best of all is being so close to nature and the weather
. Coffee in the cockpit
We had a bit of boat experience, but I just methodically started learning
each aspect of boat operation and maintenance
. After 2 or 3 years, you've picked up quite a bit of knowledge. Start now!