Hi Devon,
Thanks for getting in touch! As described in this article, you can technically use one Personal license for one live site, and just do manual updates on your various staging sites. That said, it’s certainly easier to be able to do automatic updates on your development sites as well as the live sites.
If you want to be able to do automatic updates on all of your sites, you’ll want an Agency level license. If you only need automatic updates on 2-3 sites and can do manual updates on the others, then you will be good with a Business level license.
Let me know if you have any further questions.
Best,
Leah