Hi!
If you buy 6 months - 1 year old account you definitely will need a warm up before you start advertising. Also there is a risk you won't be able to create a BM.
I'd recommend you to use Business Manager accounts to run you Ad Campaigns, they were created specially for advertising. That way you will be 100$ sure you spend money properly.
If you run german account for advertising you should use german ip in account's browser.
Thanks!
I'm really short on budget right now, i can't afford a 200$ account.
For how long do you think i need to warm up the account?
Can you please explain more the meaning of "there is a risk you won't be able to create a BM."
i'm not planning to create a business account, all i want is to access facebook ad manager and add my payment method and run some ads