If you aim to do this on a budget like us, you best be good at fixing things. Plumbing, rigging, engines, fibreglass repairs, more plumbing, sewing, electrical and electronics problems, etc.
The reward is remote anchorages where you're away from everyone else and getting absolutely unenthusiastic about yet another spectacular sunset.
Also dramatic moments in storms, dragging anchors, other boaters being incompetent and inconsiderate, many great friendships and a spirit of community amongst other liveaboards like none other.