1. Where the account is based makes no difference. It’s where the visitors are from changes how much you earn - USA getting highest, India, China, getting lower.

2. Yeah - if it’s getting enough views. That’s how you eventually get to monetise it.

3. Why are you suspecting your account will get banned? That’s not a good sign. I’ve had my one and only Adsense account for over 10 years. If your account is banned - you lose any earnings accumulated before the next pay out. You can get a new Adsense account - but it won’t be able to be related to you, your bank account, or your address.

4. Not sure about that one. Never heard of hosted/non hosted accounts.

5. Don’t buy an account. Create a YouTube channel that gets lots views. Do content that isn’t violating Adsense terms - and you can get a free account.

You shouldn't be "buying" an Adsense account, period. Adsense accounts are free. The catch is that they are only approved if your content meets Adsense guidelines and is monetisable. If you're looking at buying a ready-made Adsense account to bypass these criteria, I can only assume there are issues with your content.