I wonder how many signatures are on the multisig wallet?

Generate your wallet in Electrum on an air gap computer. Save your public key to a usb to transfer to online computer to monitor your balances.

Etch or stamp your seed words on military style dog tag (Amazon.com) and put it in a safe place. (Now, the hardest thing you have to do is determine the safe place.)

Just order a blank Military ID Tag (Dog Tag) from Amazon (or something similar) and etch your paper wallet key on it and keep it in a safe place. It won't burn up in a house fire.