Quote from: Aurik on Today at 01:16:32 PM

as my primary focus is security.
~Snipped~
its not trustless from my point of view

Quote from: Aurik on Today at 03:05:44 PM

hence security must be close to 100%

Regardless of you plugging in a hardware wallet into your computer ^{[specifically referring to your second PC]} or not, there's still no guarantee that it's going to be or remain 100% ^{[or close to a hundred]} safe.
^{- IMO, your best bet is to go with @bitmover's suggestion and use a hardware wallet like Trezor instead.}

Quote from: bitmover on Today at 01:36:57 PM

When you create your wallet, you receive a seed (24 words)

IIRC, for the Trezor Model T, it's 12 words by default ^{[128 bits]}.