I've considered something like this for crypto keys but there's no real good solution.
Either one or two people have a roadmap to steal your money, or you create an insanely complicated shame with many parties and fractional keys.
The last thing I want is for my grieving family to have to reenact the plot from Largo Wench
https://m.imdb.com/title/tt0808339/plotsummary/?ref_=tt_stry_pl
I don't use Casa but it's got good reviews, Peter McCormack (YouTube "What Bitcoin Did") swears by it
Unfortunately, Security and Convenience are opposite, give up some security for convenience and vice versa
I have a thread here on ET (on setting up a secure computer) and my setup is even more complex, I have ocd
At least once a month, I have the wife perform the complex rituals of opening and using the private keys and she does most of the crypto transactions, defi and cefi
When my kids are old enough, they'll learn as well
The most complex are the backups and recoveries , that would be too much, my instructions, if i go brain dead, or go into a coma or just plain dead, move a certain number of bitcoins to US-based cexes, accounts are already setup with 2fa
The amount not moved will have no backups, but still acceptable, risk balanced with sovereign reward
I can probably setup a VPS with a cron job, dead man's switch, in combination with a google email scheduler if trust was an issue, but if I'm dead I'm dead, not really up to me, most important are the kids, everything belongs to them