[__s]

You can make a rainbow table of the possible passwords & converge pretty quickly

Don't hash passwords. Use pbkdf2 or some better alternative (I suggest pbkdf2 because it's widely implemented)

[FabHK]

> You can make a rainbow table of the possible passwords

Can you? Here? 14 letters from an alphabet of around 90 characters?

[__s]

There's a certain network getting through quite a few SHA256s, just give it a couple decades