At $419 p.a. inc GST the Platinum plan is perfect if you require very large amounts of data storage, unlimited bandwidth and great local support.
You can easily set up multiple email accounts, unlimited sub-domains & 40 Add-on domains. So it's possible to run multiple websites from this one hosting account.
What is Hosting ? Hosting means renting space on a web server (computer). This is where your website and site emails will live and be available online 24/7.