"Mass" creating / buying Gmail accounts with 2 factor available

Hey gang,

I’m in need of roughly 500 gmail accounts that can be verified with 2 factor down the line. I was wondering what the best way to go about this is?

Currently I’m using an software that allows me to buy virutal numbers but they typically only allow 1-2 verifications before gmail stops me so continuing like this I’ll need like 300 numbers.

Any good alternative for this? I need something very reliable

Thanks <3