Once, you do the initial backup to your new low cost, not yet existing, but already way more thought out that you like to admit , server via buddy backup or ZFS replication task, you will see and notice the full speed. After that, it's not gonna make a huge difference 😂
Also if you want a good GPU for AI or ML, used RTX3090 (non ti) can be bought for 600$/€ and likely delivery the best bang for buck.
You're welcome 🙃