Cellular data plan for Spain and Czech Republic

Greetings, I will be in Barcelona for a few days and go to Prague for 3 days and return to Barcelona for the rest of the trip. I wonder if there’s a cellular plan that would work for both Spain and Czech Republic. It would be great if I could get a big data plan for like 10 days. Some internet searches show Vodafone eSIM as one option. 40 GB for $45. Is that too expensive? Or should I get one for Spain and another for Czech? Should I wait until I arrive? Is it available at the airport? I’d need a good data plan and internet access for internet searches of places of interests and restaurants, maps and directions. I rely on the internet and Google Translate as my travel guide. Thanks!