best practice for seats rotation and content sharing/transferring

hi , i'm new admin of our company's Articulate  .

Currently we have all seats occupied and we need to keep buying new seats, which is not possible anymore due to budget limit.

Does anyone has any best practice on how to rotate seats? 

Also We would like to have some ways to manage content across the users.  On one side, we would like to avoid duplicated work if some content can be re-used. On the other hand, When I remove seat from a user, I need to make sure his/her content is still safe somewhere so later she can access them if he/she get the seat again. 

Many thanks in advance.