To be clear: in this scenario you're assuming you're dead, right?
Yes! that's the assumption.
1. That should work, but if the location is compromised and someone gains access, he can patiently wait for the transaction to become valid and take your funds. So if you're still alive, it's best if you move your funds before the locktime expires.
2. This is more of an IRL problem than a Bitcoin problem. How do you usually get notified when someone dies? Someone else will have to take care of it for you.
3. That really depends on your personal situation. A spouse? Yes. A friend? No.
If I die, then step (2) will happen.
In step (2), a person I trust will get notified with the necessary instructions and will try to gain access to the backups from step (1). So, they will be able to realise if the keys are compromised.
If they are not compromised, we are good. They can wait and get the money when needed.
If they are compromised, then, I need step (3) in which another (or the same person) will be able to recover my Original seed phrase and just spend the UTXOs, rendering the Locktime transaction invalid.
So again, the problem is:
1. How I would notify my beneficiary about the key and the timelocked transaction.
2. How can I trust someone (and who) with information regarding my original wallet that signed the timelocked transaction.
I sound paranoid, I know, but if I solve those two issues, then I will be very confident and I will beta-test (
) my inheritance plan.