I’m also interested in this I currently use Satscard with Nunchuk. I have one for all my kids with a set amount locked in our safe. I also have one that I have been playing with it has ten wallet addresses I have sweep them all kept the last one open the other nine wallets are still able to receive deposits. I have also found that using Stike to deposit to Satscard is the cheapest way with basically zero fees so far even though it’s on chain.. anyway that’s my experience