That is why I am so looking fwd to the dual SIM option on the iPhone Xs -- My home T-Mobile on the eSIM and what ever local SIM I have with a good data plan -I have live SIMS for Germany and UK and have bought throw aways in other countries (for a 2nd phone I carry along)
Depending on how widespread WiFi is I've gotten by on the 2G data and bought the $10 pass when I got frustrated. No way I'd go for $5/day unless a special situation where I have connect back to my home computer/client's server for emergency work.