Bluehost Web Hosting Help
Can I make subdomains for my addon domains on the account?
Difference Between Addon Parked and Subdomains
What is the difference between parked domains and addon domains?
Reseller - Add a package
How to create a package on your Reseller account.
Upgrade CPU and Memory on CloudSites
This article explains how to add CPU and memory upgrades to a CloudSites account.