Enough info to make an educated guess.
Expenses and entry fees would have been in the $5,000 range and the calcutta bid was $41,000, so the expenses must have been around $46,000. Josh brought in $40,000 for 1st place, $150,000 in the calcutta, and just for good measure, another $3,700 by winning the one ball one pocket event. So, the net was about $188,700 and Josh's share would have been $75,480.
Without a backer, and assuming he would not have bought any of himself in the calcutta, he'd have made $3,700 + $40,000 + $22,500 estimated jelly of 15% = $66,200. He would have borne the $5,000 expenses himself, so he would have walked away with $61,200.
Hence, by my estimate, Josh made $14,280 extra by being staked than he likely would have otherwise, and he was not at risk. Guess it pays to be the world's best player.