Makes sense. SourceHut is probably perfect for Postmarket OS. Both have a strong taste for minimalism and free software. Choosing hosting provided by SourceHut instead of self hosting may also help fund SourceHut itself so that's good too. Go for it! I too am not really happy with GitLab.com. It requires contributors to fill a reCAPTCHA and I'm not a fan of it being open core. I chose Gitorious (and was moved to GitL…
I also chose this exact approach.
Previously, I ran GitLab, GitLab Registry and GitLab CI and while I think that it's a nice ecosystem to work within (especially at work, where it still is an excellent option, as long as someone else manages the instance), it was also a bit heavy on the resources and updating across major releases... just didn't work. I wrote about that previously, "GitLab updates are broken": https://blog.kronis.dev/everything%20is%20broken/gitlab-upda...
So, eventually I switched over to Gitea, Drone CI and Nexus, all of which now comfortably live on a single VPS with 4 GB of RAM. The performance is good, the resource usage is acceptable and when things break it just takes the individual component down instead of the whole platform (which is also nice for more granular updates).
I actually did a writeup about the switch in more detail "Goodbye GitLab; Hello Gitea, Nexus and Drone": https://blog.kronis.dev/articles/goodbye-gitlab-hello-gitea-...
Of course, actually applying those updates is still somewhat of a problem and will definitely be so until the end of time or until I get enough spare income to make someone else worry about all of that for me (including moving back to cloud platforms and paying for private Docker image storage, CI etc.).
But honestly my current setup is good enough for me, at about 6 euros per month for the hosting (my time is more or less worthless so not counting that).