Mark- you probably would want to use nunchuck as the co-ordinator (via multiple friends/family anywhere) and each of them has a SeedQR of your 3 of 5 multi-sig.  All the major wallets support metal/plastic SeedQRs and so your setup will even be multi vendor. Hence a signing device from lots of countries works. 

(Coldcard only supports seedQR only one-way unfortunately).  
I use 3of5 to give yourself more countries, but could 2 of 3. 👍 

 Thank you.  I’ll look into nun chuck.