It would be hard to explain to the school why are they missing classes. With all the appeal of the vagabond lifestyle, I'm not sure that is where their passions lie.

All of this is available and not expensive. Easy? Maybe not.

You don't want to do it? That's your choice.

Depends on how you define expensive. For starters it carries an enormous opportunity cost and associated risks. If you mean living on the street and depending on the generosity of others can be started with close to zero cash, you are absolutely right.