How do I run multiple Adword and Bing Accounts on a machine?

Hi

Could anybody please let me know how can I run multiple Adword/Bing accounts on a single machine? Do I buy VPS or buy IP addresses? If yes, then where can I buy them and what would be the approximate cost?

Thank You

If ,you don't want any of the accounts liked to another

Get vps,

But then

Why not MCC account if you doing agency