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I always am surprised by why people oppose to HW wallets, they are less than $100 and they're pretty much impossible to "hack".
If your investment is +10k and you don't have a HW wallet you're walking on thin ice.
Sorry but this is the most stupid thing I've heard regarding safeguarding crypto lol.
Why not make an Ubuntu bootable USB, why windows 10?
And even with your unnecessary method, your steps are wrong. You first need to send ETH to the address, verify it arrive and that you can send it back, and then you take out the hard drive.
I could write a bible as to why your method is slow, unsecure and bad but I'm just gonna say that creating your seed in a hot wallet is a bad idea, there a bazillion ways you could get exploited. Buy a HW wallet, they're literally $70 and will save you this pain in the ass PLUS being like 25 times more secure lol
This guy created the most unnecessary, slow, impractical and unsecure method to safeguard his crypto to avoid paying $70 to Ledger/Trezor.