Please provide all pertinent information for your website build. There may be additional costs for certain plugins or infrastructure, depending on how you answer. If plugins, some of those are free to use, and some of them may require a subscription. Subscriptions are usually yearly and most often are $50-$100 a year. In regard to e-commerce sites, sometimes plugins can be more expensive. 

All websites are built on WordPress. Any hosting packages must be made for WordPress, including security infrastructure. WordPress requires certain server settings to keep it as safe as possible. You can not singularly put a WordPress site on an open Cpanel system.