The validity of this approach depends entirely on your goals. If you just want to run a successful business, then by all means, mow lawns for a living. However,

The validity of this approach depends entirely on your goals. If you just want to run a successful business, then by all means, mow lawns for a living. However, if you have passion for a particular market or technology, then you'll be bored mowing lawns, even if you make money at it.