I was actually thinking of doing something like this using Amazon Mechanical Turk, maybe not to subtitle the entire show but just to get a much bigger test set than I have the patience to label myself. I'll check them out, thanks!!
No worries. Prices I've seen so far range from RMB 10 to RMB 100 per episode - probably depending on how popular the show is and whether they already have a transcript available because someone else wanted it or whether they'll need to transcribe it for you.
http://www.bijianshang.com/page/contact/contact.php
They sell soft-copy transcriptions for any show you want.
They charge per episode so it can get pricey if you do an entire series but getting a couple of episodes is quite affordable.