not true anymore, everybody can buy eu domain

cloudflare takes 0% commision, but its cloudflare

porkbun is good and cheap

its little money vs time you spent on it (backups are almost always missing something)

you can use raid 1 with 3 disks gg (or 4 or 5 or 6…)

yes

I wouldnt never do raid with only 2 disks, it doesnt seeem safe tbh, 3 disks min (2 disks as backup)