Orange Pill Advice

My local (Sydney, Aus) laundry has recently posted a sign in their window encouraging the use of cash, stating all the typical reasons to do so (no bank fees, private, immediate etc). The sign was quite well done, making me think it's more for ideological reasons that for tax evasion.

I'm trying to think about how to most effectively get her orange pilled, and give some advice on how to start accepting BTC in a way that meets the advantages of cash. I'm going to assume the owner is not particularly technical, so a custodial solution is likely the only that's going to work, but as far as I can tell they're more or less all KYC.

Something like a Breez or WoS is great, but the payments can't be accepted in dollars which I think is important for getting a business on board. If they do their first day of business and then we see a 10% drawdown overnight, they'll never come back.

Strike is great, USDT support but no PoS interface, and KYC which I think writes it off in this case.

Anybody have experience making a similar argument in a way that's fast and easy to both understand and implement for a non-techie shop owner looking for a cash equivalent?