You should probably switch from omeprazole to famotidine. I used to be on omeprazole until my doc noted that there are indications of it be a carcinogen when used long term. Switching was a non-issue for me.
Of course, I’m just some rando on the internet. You may want to seek some reliable info on the topic. Look for PPI vs H2 receptor antagonist.
I have built and maintained all manner of home servers using inexpensive used hardware. Any PC or old laptop can do this stuff. Unless you’re doing something crazy on them, I’ve not encountered a lot of situations that I could not sort out. Usually throwing some more memory and storage into them solves most issues.
I ran a used desktop machine with an i3 processor (retired school system) for YEARS as my NAS with zero issues beyond adding a little cooling. Did the same with a firewall, worked for ages with no issues.
Getting a mini pc is nice if you are putting it in your living room, but there are still many choices for small form factor devices. Not quite as small, but still pretty small. Lots of them were used as POS terminals at stores. Wipe 'em, reload and start fresh.