It all depends on the format you play.

Modern costs a lot and the power creep is huge, it forces you to spend $$$ almost every year.

Forget Legacy.

Pauper costs nearly nothing but you have to like the playstyle.

Commander I don't know I don't play it.

Advice: Pauper is OK; the rest is wasting money, just play with proxies with friends at local small stores which allow them.