Worth the cost to the team, absolutely.
Worth the cost the the players, probably.
Worth the cost to the fans, well, that's an interesting debate topic.
Personally, since I don't actually enjoy the monetary benefits that come with a Super Bowl win, I'm on the fence. I watch the game, and cheer this team, for enjoyment. (Have since '77) Can I say watching the team this year is enjoyable? Nope. Heck, we even have people on this list saying they won't turn on the TV if Wolford starts.
Right now, I think I would rather have a consistant playoff team than a one-and-done every 10 years. If you'd asked me that question last year, I probably would have said the opposite.