Need to create about 1000 Gmail accounts for a side hustle.

Hi there,

First up, disclaimer: What I'm trying to do isn't scammy/spammy etc. In case any of the mods would like to know more, happy to share more about the idea via DM.

I'm working on a side hustle that requires Gmail accounts in thousands (at least 1000 for starters). Tried creating accounts but unable to create more than 6/7 (since Gmail associates new accounts with your phone number, and doesn't allow you to create more than 6/7).

Now how do I go about doing this?