Create landing page in webflow but hosting it elsewhere

Hello I am planning to work on a landing page for a client and they already have their custom domain bought and hosted separately, meaning that the landing page will be a subdomain page part of their main website.

  1. Is it possible to have only the landing page created in webflow but to keep it hosted on their provider? or does the client need to pay the monthly webflow hosting subscription?
  2. If the answer to the first question is yes, then how does it work with the editor part? Is the cms still managed on webflow? Where is the data stored?
  3. The landing page should also have a connection to Marketo to collect data, how will this work in terms of the data Webflow collects? For example site visits and cookies.