Nano offers a fee-less transaction but it hasn't reached the point of popularity that it is widely used if I am a shop owner or a service provider I would have opted for more popular ones with cheap fees like Tron, Doge, Shib, Litecoin, and coins that are on the top 50 at least, you can also use Bitcoin lightning network, your customers will accept it and they will not ask a question the coin that you're going to use and besides the community is used to transaction fees because they understand that these fees go to the miner to keep the network going on.