I've been working with the Caprover community on getting a one-click install built into their system. This morning someone showed me how to do an install in about 5 minutes. If you're using Caprover ( http://caprover.com ) you'll be able to deploy and maintain multiple Grav sites very easily. See the instructions here:
https://github.com/caprover/one-click-apps/issues/215#issuecomment-654161878