Reasonable doubt: between the two rifles, ammo, and armor...figure around $5k. The burger-flipper job? Take-home pay, I’d guess somewhere around $1,200 if he was working full-time (begs questions because he was still in school, so it had to be part-time and lesser income).
No license. No vehicle. Only habits he had...gamer. Probably would have generated the income in six months for the hardware.
He had dropped out of school and worked full time for nearly a year.
I read he wasn’t graduating because he mostly skipped school, but he did go to work. 30 hours a week x $12 an hour x 52 weeks is sufficient to buy a couple of expensive rifles.
Maybe he had his grandparents' debit or credit card....