I only briefly see the 1st part ("Personal Server"). But since it involve using PGP and setting server where you access it with .onion rather than plain IP address, average people would find it challenging.
It's truly challenging for normal users.
I watched some videos of Andreas Antonopoulos in which he advised that people should never complicate their back up methods too much because it can result in more complex recovery procedure. In worst case, if recovery procedure is broken in the middle by broken piece of initial back ups, the wallet will be lost forever.
Generally, i agree with Andreas. Although each people would choose different security/ease-of-use trade-off. Video shared by @apogio is still suitable for those who're familiar with setup and maintaining server.
Point "B" (point of arrival): a BTC-wallet with a secure storage of the seed phrase has been created in advance.
I think you forget to mention that you need to store the device or other medium which used store the private key/seed securely. Unless you have property on point "B", you probably have to place the device/other medium on someone's else building.