What do you think of this productised service for podcasts?

Hey Guys,
I'm thinking of a productised service for podcasts hosts where for flat fee of $249, I will transcribe their word by word podcasts within 48 hours of the placing the requests.

I was thinking of pitching it as unlimited offering. Not sure about it. Can also try something like 7 episodes of max 1 hour each.

Further more, I can add some add-ons like,

• Show notes
• 5 custom graphics, each for Facebook and Twitter.

What do you guys think? Feel free to share an honest feedback.