GrapheneOS has benefits even when used with Google Play Services. At least on the primary profile, you can install the Phone by Google and get good call spam blocking. Other apps that you’d prefer to be siloed can be put on another profile without play services.

Tungsten plates and calcite in moderate quantities. FNEI recently got updated to be 2.0 compatible, so you can check the supply chain for things that you want to make on Nauvis.

I’ve had good luck with atomic bombs against the small worms. The only downside is needing to import so much Uranium.

I don’t know how easy it would be to migrate to your own local machine, but what you’re describing sounds like Desktop-as-a-Service. All of the major cloud providers offer this in some form.

DroidFS has been working well for me. It’s available on F-Droid.