Since I needed to create a machine where I'd like to run a k3s sinlgle node cluster, here's how I'd do it so that I can bring my skills and knowledge to 2023 :D.
ansible-playbook -i inventory kvm_example-k3s-vm01.yml
For the most part, you can take a look at kvm_example-k3s-vm01.yml, The configuration of the image is done via
Combustion see hosts/roles/kvm/templates/combustion-script.sh.j2
for more details on how this is implemented, and where I took the script from.
I used https://www.redhat.com/sysadmin/build-VM-fast-ansible to get started and modified contents over time.