My wife and I run a tech business and can handle/have access to our mutual tech assets. But it we both die? We're setting up a casual agreement with a local tec

My wife and I run a tech business and can handle/have access to our mutual tech assets. But it we both die? We're setting up a casual agreement with a local tech-peer to manage the transition/sale/etc. of our business assets. I'll be making and printing (on paper) documents with access credentials. While passwords change, I'm confident this trusted advisor will be able to worm their way in even if some of my password are no longer valid. 2FA is the biggest question as some vendors don't' offer printable backup codes. I believe the solution might be giving access to my backup 2FA device to this advisor. Personal tech assets? I have no plan, but soon my kids will be old enough to be able to manage with proper instruction.