You’re welcome @lucianodlf. I have been maintaining a Raspbian install script at git hub. Currently it’s only up to date for Raspbian Stretch. I will add a Raspbian Buster branch when I make the new Buster images to be sure that everything is working for the pi 4. I am still waiting to get one. This installer should be the one I used to make the temporary Buster image that’s available. I haven’t tried it for a few weeks so some things might need to be updated to work now. You should be able to put that in /var/tmp and then run “sudo python installer.py” with the available options.
There are some issues with emulation that have made me avoid it including networking. I prefer installers to directly install to a machine with Ubuntu for instance. This installer was made for a local Ubuntu installation without networking that I made for a user. I didn’t hear back if it worked for them but it worked for me. Using a direct Ubuntu installation or an Ubuntu Image is the approach I would take instead of using Raspbian Desktop or trying to emulate ARM Raspbian. It’s much easier to make images for the Raspberry Pi because the hardware never changes so the settings can always be the same but with laptops or desktop PCs the settings may have to be unique to the hardware. The installers have to be tailored directly to the OS and the package versions as well. One file, stem.so, has to be compiled for each architecture and updated when php changes versions. It’s hard to automate. Premade images is much easier so it would be nice to figure something similar out for Desktop.
To start, I would first try installing RACHEL on an Ubuntu LTS installation using that ubuntu_local installer. Then I would try running that in a VM and see what happens. If that works I can help you introduce networking with another installer and go from there.