Ratimov originally created this list of hardware wallets, but it's been years since his original post and some of these wallets are no longer available or have been discontinued by their manufacturers. I've taken the liberty of translating his list, putting together my own updated version here:
[VELIKA LISTA] Hardverski novčanici, and I will continue to update this list as new hardware wallets are released.
Since you are speaking about that nice list fork, I think you need to update last few hardware wallets I found and posted in that topic, Ice wallet, Citadel, PirateChain Wallet, and one more you wrote about Ellipal Titan Mini.
I am not suggesting purchasing any of this wallets, but I am just reminding you that you need to update and refresh this list, maybe even prices changed for some devices like Trezor.
If we're talking about a small amount of bitcoin, there's really nothing wrong with a mobile wallet. It's mostly for learning purposes in the first place. And there's a reason why I mentioned that OP should help gramps correctly setup the wallet.
It's nothing wrong with them, but they are generally not very secure and we don't know if this guy is even using smartphone, so it could be a double learning process.