has anyone here successfully onboarded a local store to taking Lightning payments? My number one goal is SIMPLE and foolproof.

Custodianship is likely best for this application (for now).

easiest thing I can think of at the moment is giving them an old android phone or tablet on WiFi only and helping them get a Strike account and instruct on how to take payments with Lightning invoices. if they already have an iOS or android device in house, even easier.

other ideas #AskNostr?

one day I'd like to offer a locally-hosted (I'd run it for all to use) Lightning node and related infra, but I think that's jumping the gun, especially when I might have to also be orange-pilling them to begin with. although I've got a leg up there...: I've bought farm products around here with lightning and I can show newcomers receipts on the extreme low fees and how those payments have appreciated in dollar terms since the producer received.

that, plus I would guarantee a certain amount of weekly business if they take bitcoin ;)