That's the way I look at it. I've had a few different hobbies over the years; saltwater aquariums, guitar and amp collecting, comics and toy collecting, and this hobby is by far the most inexpensive.
My girlfriend is much happier now when i come home with a $25 model kit than when I used to come home with $$expensive$$ guitars, amps & FX pedals and rare marine fish and aquarium equipment.. LOL