Either listing self service options, like nostr:nprofile1qyxhwumn8ghj7cnjvghxjme0qyt8wumn8ghj7etyv4hzumn0wd68ytnvv9hxgtcqyzjnd2cl0u7qzva64k7lgu4343adfdm5a4pjcxvf9pqex4e83z72qngxhfg and an accounting package and a PoS terminal solution.

There is an industry leading Bitcoin accounting package, I've heard the nostr:nprofile1qy2hwumn8ghj7etyv4hzumn0wd68ytnvv9hxgqgcwaehxw309akxjemgw3hxjmn8wfjkccte9e3k7mgqyzh0p44jz2p87wapmescjcf7d4yzfuvp74nmzgzjw0qk390a4u9jxlprakr and nostr:nprofile1qyxhwumn8ghj7mn0wvhxcmmvqywhwumn8ghj7mn0wd68yttsw43zuam9d3kx7unyv4ezumn9wsqzp382htsmu08k277ps40wqhnfm60st89h5pvjyutghq9cjasuh38q7t6dtc discuss it in their podcasts. I can't remember what it's called and Googling doesn't show anything familiar.

Or you have the consultancy service from people like nostr:nprofile1qyxhwumn8ghj7cnjvghxjme0qy2hwumn8ghj7etyv4hzumn0wd68ytnvv9hxgqpqnqt6hg6k78la4uj0c0yc44s28t8nkgaaee7rdnrr0vszlul4wwdsxfu4ej they setup nostr:nprofile1qyx8wumn8ghj7cnjvghxjmcpp4mhxue69uhkummn9ekx7mqqyze6vrr0rg5aq3j2dq0e24xl7xdv6qjpvs8tv0t0s678egrfjm706ngaqxu merchants for Peter and I've met them at a local Bitcoin meetup.

I don't know how much time / effort you're prepared to dedicate to this, but I think this is potentially the start of mass adoption by an industry that needs help.