International travel would be challenging without a passport, and would require breaking laws as you illegally cross borders or bribe officials. International travel would also be challenging without feet. It would require more patience, and would limit much of what you might like to do.

Music can be a very problematic hobby for a long-term traveler. Many instruments are too heavy, too sensitive, or too expensive for a wanderer to bring along on their journeys. I myself have often been seen hiking down a highway with a mandolin, guitar, fiddle, hand-drum, and a large backpack strapped onto my overburdened body.