Takes literally minutes to setup with Webtop (assuming you are familiar with Docker/Podman https://docs.linuxserver.io/images/docker-webtop/ ) , nothing to install on the thin client, the stock browser is enough.

I used this when an employer was forcing me to use Windows and I needed Linux tools to work efficiently so I connected home. Goes through firewalls, proxies, etc.

Anyway if you want to host this not at home but a cloud provider there was HavenCo https://en.wikipedia.org/wiki/HavenCo don't ask me how I know about it, just curiosity.