Don’t underestimate the increase in time that this would take compared to sharing one database with one set of users. Whatever option you choose, the decisions you make now are mission critical because if you get them wrong, you’ll be in big trouble down the road because of technical debt. Generally this is in terms of database structure.

If this is your first Bubble project, it’s a hell of a one to embark on an expect to start over a couple of times. So good luck!!