Good day riki@epg!

I appreciate the details you've provided. 

When you set up QuickBooks for Multi-User access, you have multiple options for the setup procedure. You can choose between having a dedicated server computer, or using one of your office workstations as the Host.

Please refer to this article for more information, and for detailed steps: Hosting your company data file in multiuser mode. 

Please don't hesitate to reach out again if you have other questions. Thank you.