Hardware wallets are simply the best option in terms of user-friendliness, usability, safety and price, period (if a renowned and praised hww is bought)

There's simply no arguing against, and sure, you can DIY it, but what do you win with it?

The best possible outcome is a working hww, the worst, total inaccessibility of funds, congratulations.

Seriously, if there's any serious money involved, a professional hww is the way to go, period.