You forgot it will need world class $$$. To pay a very big captcha farm because your crawler will be blocked everywhere. And a very big proxy farm, for the same

You forgot it will need world class $$$. To pay a very big captcha farm because your crawler will be blocked everywhere. And a very big proxy farm, for the same reasons, because everywhere google/bing crawler is hardcoded, including your frienldy cloudflare, and you cannot have a partial of the internet.