How long does it take to migrate from Strapi 3.6.9 to the latest version?

System Information
  • 3.6.9:
  • Mac OS:
  • Digital Ocean:
  • Node Version:
  • NPM Version:
  • Yarn Version:

I want to hire a developer to upgrade my Strapi version, and I intend to pay them by the hour. How long does a typical migration last? Can it be done in an hour, generally speaking? For a basic site without any complicated aspects.