Plus, you should ask him to join this platform where he could grow more and can earn extra money too while sitting in the shop in his spare time. I hope you like this idea because helping others will help you in the future. Plus you will get a partner in crypto and you will not be alone anymore. I sometimes, give a thought of giving ideas to my relatives who are involved in trading (not digital goods) like in real-world trading via shops and other ways. That you should prefer crypto as a source on payment. But i always hesitate to tell them because i know, no one will prefer this way, even my relatives won't because they are tightly bound to banks and traditional ways of finance so i doubt they will shift to this method any time soon.
Maybe, if a BTC ATM is implemented in our country then it might be considered as a payment. Well, it all depends on the actions that government takes against crypto. if that is in support of it then i hope my relatives will prefer it otherwise not.