Oh cool, so I embed the lnurlw onto the nfc. Then I can print the QR onto the back (just in case nfc doesn't work properly). Presumably then I'd have to host the wallet on my own node? Is there a way to do this so im entirely out of the mix using some custodial wallet or something?

Oh sorry just saw you also posted lnbits. I've tried that in the past but got rugged (was my risk to take and they warned me so not their fault) cause it was not a production product. Looks like they've made changes and its no longer beta?