Recurring Products?

I have a company that hosts websites and builds them. I want to show how much the product costs initially to set up and then how much the monthly hosting fee is- on the sales order and invoice. How can I customize this? Ideally I'd like to show the total for the monthly hosting charges (i.e. if it's $10/month to host the ecommerce store and $5/month to host the social media- total MHF is $15.00.

Also, somewhere I saw that if you purchased zoho crm that projects was included for FREE. Is that true? I'm not even able to figure out how to let my CRM application know that I'm a paid user of mail.