I kinda thought to myself about buying one or two suppressors and using them for everything, but then I realized ultimately, it's a compromise. What works great on one, is gonna suck on something else, and so on.
Like I dunno if I'd ever want to shoot a decent amount of .22 LR through a non-serviceable suppressor. And then I might get a hankering for a suppressed 9mm upper for an AR. Or maybe a 5.56 SBR. Or maybe thread and suppress that .308 bolt gun that's been sitting in the back of the safe like forever.
I've been evaluating and thinking about what I want to buy, and honestly, I just said fuck it and I'm gonna buy multiple cans for what I want to do, I figure I'll get the best results that way.
But that being said, and it's more than what you've budget, you can cover a lot of ground with three suppressors - a .22 mag rated rimfire can, a .45 auto pistol can, and a magnum rated .30 caliber rifle can.