I have never owned a single hw wallet till now and never lost a coin to a hacker.
I'm in a similar situation. I own an old ledger nano, but I use it only to hold 10% of my coins while the rest is safe on Electrum. I've used this wallet for more than 8 years and never faced any problems.
My setup is also pretty simple. I use a computer that I bought solely for the purpose of holding bitcoin. Clean system, no additional software, everything is offline unless I want to send a transaction. I keep the computer disconnected from power and network all the time.
Fun fact: I know people who hold bitcoin on their online computers and have done that for 5+ years. They just keep it clean - no porn, no torrents, no pirated software.
I can't believe someone had $5m and was looking for a discounted HW wallet. It's like buying a $100k car and getting the cheapest Chinese tyres on the market.