Privacy in Spain is not a thing. I recently stayed in a Hotel in Spain and they want to scan your ID (illegal) to send the details to the police (it's a law). But nobody cares. Tourist happily hand over their IDs and wait 2 hrs to get it back. So better don't use Hotel WiFi's, even if you connect via a VPN. Better use WiFi's at a restaurant or bar, waiters usually tell you the password, most of the time it's 12345678 or the name of the bar 😉 .
True! The ID issue is affecting also Airbnb, but there’s options on the black market, specially for longer periods (weeks and so).
In my opinion most of the #VPN services are #honeypots.
Assuming you have decent one (maybe your own):
What would be the problem when your ID is connected to your room connection if all the traffic goes through the VPN
Because IP address can still leak. Each time you connect to the internet, your ip is blasted all over the place. You can not be sure that your vpn app handles reconnects etc safely. Safest is to use a mobile router with always on VPN that blocks internet when VPN doesn't connect. Might be overkill but if you are an activist (I'm not) you would need to be super cautious.