If you going to do longterm hodling you going to need a hardware wallet. Don't try to cut corners you will hurt yourself. You going to invest that much time in hodling then you can afford a decent wallet.
I know your question was meant to not include hardware wallets as part of the answer but you asking something like "what kind of tires should I put on my car if I don't want to spend a lot of money" some things you just don't skim in life, it just isn't worth it. But if you want to risk your crypto just to save less then $100 then you, not a serious investor. I would use electrum wallet.