For password cracking/bruteforcing: just hire a VPS with a strong (dedicated) GPU to perfom those tasks. At most cloud providers, you can provide a template, allowing you to spin up a machine in, a couple of minutes (at the worst). After you’re done, delete the machine. It will cost you a couple of euro’s/dollars per month, but it becomes financially attractive quite quickly if you can save a couple a couple of hunderds bucks in buying your laptop.