As long as GAS is not eating into the budget for beer, it's all OK.
"Photography" as a hobby can be anything you want it to be. That means that learning about different bits of gear, trying out different lenses, or rescuing old equipment from the dustbin is just as valid as going out and taking pictures.
I know people with RVs and old sports cars that spend insane amounts of money and time on upkeep for each short hour of use of their toys. Boats are even worse. And then there's cocaine! So it could be worse.
Enjoy your gear!