Good question
I had the same debate before the California AW Ban. Before the ban took effect, I bought all the rifles and mags I could, even mags for guns I didn't own yet but hoped I one day would. I went thousands of dollars into debt, but now, 4 years later, I've paid it off (it only took about 2). And you know what?
IT WAS THE BEST DECISION I EVER MADE.
If I hadn't done it, I would be kicking myself every day, I'd be so upset that I'd have to leave the state. If I hadn't done it, I never would be able to own an AR. Never be able to have any mags over 10 rounds. I have a suggestion for you... whenever you wonder what to do, just look at what's happening here in Kali, and I think you'll see everything clearly. I just went back in to debt because of the .50 ban, but I know it was the right decision. Paying off debt is not hard if you have some fiscal displine after the fact, and work on paying it off ASAP. Just don't let the window of opportunity pass you by, you will regret it for the rest of your life.
Oh yeah, and all this talk about saving money for when you NEED a car, house, etc... what about when you NEED a gun? When you need a rifle, YOU NEED A RIFLE! Way more than you'll ever need a new car or house. When the SHTF, you don't want to be standing around holding onto your #^#% because the only gun you've got is grandpa's .22, you want an AR-15 and backpack full of Beta-C mags!