I, personally, have only one account as I do not have fake accounts neither I ran a page or something.
If you are a business owner, it is recommended that you either change your profile to a page, or simply create a new one to make a distinction between private and business.
Facebook does not put a limit on how many accounts you can have as you can not get banned for them, like it is a case with video games, so no matter how much you create, you should be fine.
You will not break the rules by creating 2 accounts or even more if you are not doing anything illegal in the country you are currently in.