Very interesting site. The fellow does not seem to be planning for early retirement but as he appears to live very cheaply I expect he could be financially independent already
I have read books by and about several such adventurers and even met a fellow who kayaked from California to Hawaii. Always very introverted people as the trips were undertaken without advertising and often over the opposition of friends and family. Yes, the pictures of friends and natural locations look enticing but there are no photos of cold, dark and dangerous portions of the trip, sometimes with mind numbing hours of boredom and brief moments of terror.
Fortunately I enjoy my job and because I have saved enough I will be off shortly to Tahiti, a very pleasant place to kayak. I'll see if I can post a picture of kayaking in Rangiroa.