I agree with RWFeefer above, this hobby is as expensive as you want to make it, but it does not have to be extremely expensive.
That said, if you have the money, I think many of the expensive items tend to be pretty good quality of life improvements, but if you don't have the money you just have to work a little harder.
That said, if you have the money, I think many of the expensive items tend to be pretty good quality of life improvements, but if you don't have the money you just have to work a little harder.