In the beginning, buying the latest & greatest was the futile attempt at improving the game (the Groove?! Ha!!).
What discs work best for me has, for the most part, been figured out, so after spending thou$and$, now my purchases are more about supporting the disc golf community.
To thin the heard, I have a couple of different means, one unintentional, the other purposeful. I have a propensity for losing discs, fortunately not discs I feel I can afford to lose. My patience for hunting lost discs of my own is very thin (I'll help someone else look for their lost discs until the cows come home). They are, after all, plastic (or rubber - Vibram) toys that can usually be replaced. The other way is to give away, intentionally, to local leagues for CTP/LP prizes. Or giving to friends.
If I were on f/b, I might do more in the way of trading online. But I'm not, so I don't.
All in all, how much you spend is your choice. As long as the bills are paid & the babies bellies are full, spend away.