What can I do with his doxed info? The amount I lost is ~$2,000. Will I be able to pursue anything legally?
Yeah you could. You could also send pizzas, and swat him.

It would probably be a better idea to send a detective to his house rather then a swat team. As this would more likely result in charges actually being brought against him, and justice being served.
You mean,
hire a detective to chase after $2k? Never tried that myself, are they really that cheap?
Or do you mean like hire one of those detectives in China or India, where the wages are low, so they could track down Master-P in their own neck of the wood?
How about this: dress up in your fedora, order (bonus: on DNM) one of those detective kits with a plastic spy glass, a plastic gun, and a plastic "DETECTIVE" badge, and do the job yourself? I mean, about as real as everything else here, why break stylistic consistency? I'm sure Master-P the trusted escrow wouldn't mind/care/know the difference.