System Admin time estimates

Hello all…
We’ve recently deployed Enterprise as a zip deployment (30M LOC).
I’m writing a business case for a System Administration role to support this SQ deployment and wonder if any of you can help me estimate the effort hours you’ve seen for both:
a. initial stand-up, and
b. on-going maintenance.

I’m considering responsibilities such as:

  • Upgrade and maintain SonarQube’s OS layer
  • SQ app and db upgrades / maintenance
  • HA proxy and SQ app redundancy (when in high available architecture)
  • db replication for SonarQube db (when in high available architecture)

Any thoughts, suggestions, and estimates welcome.
Thank you,