maybe consider using shamir backup..
Thanks, always open for useful suggestions.
As the NANO-S is somewhat limited, i consider some upgrade in the future, but i had some doubts (not so much related to security) to buy a trezor in the past, but i am going to look into it again soon.
Just remember to keep your passphrase(s) secure, but relatively easy enough for you to remember. With overly complicated passphrases, complex memorization schemes, etc., you're running the risk of locking yourself out of your coins, and that won't be fun.