We have to set up 70+ micro-sites in Sitecore so looking for best approach for long run. We already have 3 sites on production on single Sitecore instance i.e. we did multi-site implementation. See below tree structure in Content Editor
Site1
--Home //Keep all content/pages
--SiteData //Keep common content/navigation menu content
--SiteSettings //Keep setting specific to site
Site2
--Home
--SiteData
--SiteSettings
Site3
--Home
--SiteData
--SiteSettings
Now to set up 70+ microsite here is the options
Option 1 I will keep continue adding new site node below Site3 for ex: Site4(Home,SiteData,SiteSettings) , Site5(Home,SiteData,SiteSettings),Site6(Home,SiteData,SiteSettings) and so on I'm not sure if this is the best approach because finally we will end up having lots of site node in tree structure
Option 2 I will set up only one sitenode below Site3 called Microsite but in this approach not sure how would I maintain each microsite specific navigation menu and content as well.
Which one is best approach from above or there is any other way we can handle this set up
UPDATE 03/28
The Urls for sites will be
microsite.mysite.com/company1
microsite.mysite.com/company2
microsite.mysite.com/company3
and so on