[buwaya]

BS. Spain developed significant LNG capacity much faster for much less.

Here is a current project to build a new LNG terminal. There are other existing ones, this is just an add-on.
You are welcome to scale capacity and cost for a reasonable estimate.

https://www.tankstoragemag.com/2020/11/23/endesa-to-build-spains-largest-lng-bunkering-terminal/

[NorseViking]

Check out the Spanish consumption and sources.