1: Create New Account
2: Press the 14 Day Free Trial when the PS Plus screen comes up
3: Add a PayPal or credit/debit card (Follow Step 5, So you wont be charged)
4: Accept the 14 Day Free Trial
5: Go to Settings, Account Info, Playstation Subscriptions, In the bottom right turn off auto-renewal
6: When your trial ends perform these steps again with a new account obviously.