as much as it would absolutely suck to pay the debts out of pocket (since plank went out of his way to host the event), he's using money that isn't his. the players played and won the money appropriately, and it should be theirs. when people registered for pound, they paid entrance fees and venue fees. the entrance fees were rightfully won by the players, but plank is instead using it to pay for the venue. this is a lot different from SNES where some scumbag pretty much collected the entry fee's and peaced out lol.
so yea, it's crazy lame plank got stuck with all these fees
but it's even worse that he's using money that isn't his to pay for it
end of the story is, you can't rely on a random chance to pay off for the venue. there was no telling in the end how many rooms there would be, or how many players would end up registering. that's why most tourneys make a deal with the venue to pay them based on the amount of entrants that come, so everyone is covered whether 5 or 500 players show up. there was also no warning that money could potentially be taken from entree fees to be used for the venue if the venue fee didn't cover it the venue costs.