Chris's begging has been really inconsistent. On the 8th, he said he needed $600 for room accommodations and spent the day bitching on Twitter about the financial pressure. Then over the next couple days his tweets were mostly just gushy reactions to fanart. On the 10th, he begged for 10 sales of book sets, saying he needed the money by the 11th (and if he actually did order the book sets, that'd be only $300 in profit for him), then retreated into his Merge fantasies and spent time making pointless retcons to an old Sonichu comic. He didn't beg on the 11th, and then on the 12th, retweeted one of his first begging posts, in which he asked for someone to spot him $600 in exchange for an autographed book set.
I wonder if he conjured up the money to go already and the subsequent begging is just attempting to get a bit more for buying stuff at the con, or if he's deluded himself into not worrying about it too much because the Merge or a paypig will save him at the last minute.