Difficult question to answer because it depends on your definition. Don't forget that a tour pro has a limited working lifespan so ideally he needs to be earning enough to secure his future once his playing days are over. But in simplistic terms, he probably needs to earn around £150-200k to break even. He has to pay tax in the country of origin for any winnings, a flat weekly fee to his caddy plus a percentage of winnings. Then he has flights, hotel, food etc to pay. An estimate of the cost to play on tour is about £2k a week.
edit: No, the caddy pays his own expenses.
