It's totally normal. Put it this way, this addition / hobby is a pretty positive thing. A lot of people get a lot of enjoyment out of these shows. They are also a great outlet for the OCD person or person who just needs to stay busy.
I'm also coaching volleyball, 2 teams ... and assisting a third. Serving on a board and working a fulltime job. Again, I like being busy ... this addition is a healthy one, but does hit the bank account.
I tell my wife that this is a lot cheaper than counseling, drugs or alcohol ... and for me, its good to have something you can really get immersed in, take pride in ... and challenge yourself with all year.