Depends what you need, with zeus ln you get a node on the phone, and you can use for a POS. For the bitcoin cafe probably an old laptop and using ubuntu you can install btcpay server, which comes with a node, and they have a fast sync setting that downloads 90% of the chain and all you need is a day or two. If you want to try btcpay, you can get an account free at my sever lnbucks.com , takes 15 minutes to start accepting payments, you can link your primal wallet with nwc so you get the payment directly to your wallet. Happy to help if needed