Go to an astronomy forum site, similar qns like do you need to spend$$ to enjoy astronomy. Bet that the std answer from 'old bird' is NO, they will say that what you need is your pair of eyes or maybe with a starting grade bino is enough... True? Of course.. but really statisfying???
I remember reading from one website (cannot remember the name, but still can recall that it is some famous popular photographers, at least from the web), that he said he used to demonstrate to his student how he can take a good picture from an old, low tech camera to demonstrate his point..... But you may wish to look deeper and see his arsenal of equipment....
I think the qn is: to what degree of interest will one then consider it as a hobby? Taking photographs - then no need $$$ (do a google search on one jap website - I think is call Weekend Photogenic, and see - but note that he is already an accomplised photographer!). But to put your passion in and exploit the world of photography - no need $$$?
I was at Jurong East National Celebration on 9 Aug. There was an old man with a Nikon D1 or D2 series camera (from the shape I think) + a 70-200 or 80-200 lens and also a father (30+) with a Canon ISUS V series type. Both happily shooting away. Guess when they go back, from what angle will they look at the shots they have taken?? I bet photography is one of the old man's hobbies. And I also believe the father will be enjoying the photos taken and the memories he had recorded.
My opinions:
Photography as a hobby (my own definition) - YES - you NEED $$$ - much more that you expected when you got started!
Taking good pictures, enjoying taking photo, recording memories - then dun need much $$$. Like watching meteor shower with your gf, or looking at the moon or Orion,etc with your family/kids