The basic ClickFunnels landing page/sales funnel builder package costs $97 per month.
For this Starter Plan you will need a third party autoresponder email service for email marketing.
I use and recommend Active Campaign.
The Starter plan has a limit of 20 funnels.
The Enterprise package or Etison Suite, with an unlimited number of funnels, costs $297 per month.
The Etison Suite is a one stop complete business package
There is a dedicated email service called Actionetics….
…plus Backpack for buiding and managing company affiliate programs.
I would recommend the Etison Suite as a critical one-stop business tool.