Getting your own ball and shoes will pay off in the long run, especially if you buy quality.
Owning your own equipment means you get consistency- you don't have to adjust your style to adapt to idiosyncrasies of unfamiliar gear. You could see as much as a 30pt jump in your average- I went from a 130 to a 160 in a single season, and never looked back.
And as for quality? I spent $100 on my last set of shoes, and they've lasted 10 years. Over that same span, one guy on my team spent $20 on his first pair...which lasted a year. Each year, he bought a new pair, and by the end of the decade, was paying $45/pair. IOW, I spent more up front, but I spent less per year on average.
