Creative Cloud subscription is account-based and not machine-based, so each user should have their account and hence a separate subscription. When multiple users share the same computer, all they need to do is log into the Creative Cloud app using their account and start using the apps. There is no need for separate apps installations. Also, since the subscription is account-based, you can use it on both the MAC and WIN OS. The only caveat is that the app on only one machine can be used at a time for a single subscription. Hope this clears your confusion
In case it isn't clear, the normal subscription is for a single person only. There is no option to add users to it, and it is not allowed to share it with friends, family, colleagues or staff. So you'd need a subscription each.
You mean you can't afford $10/month for a Photography Plan? That's as cheap as it gets and includes the very latest versions of these great products & services: -- Photoshop CC and Photoshop on iPad -- Lightroom on desktop, mobile and the web -- Lightroom Classic -- Portfolio website + hosting -- Spark with premium features -- Bridge -- 20 GB cloud storage (upgradable to 1 TB). https://www.adobe.com/creativecloud/photography.html