Average price of AC instalation in Spain goes from 550€ to 5000€ depending on what kind of instalation, equipment and units. Average wage is between around 1300€ net per month.
In Spain it's not cheap.
Edit. And also local towns have rules, I can't just install one that have a device on the outer wall/window and I own the whole house, in the flats you depende on the community to decide.
I have been using GrapheneOS for a few months in Spain with and out of three banking apps only one gave me trouble, I had to enable "Exploit Protection Compatibility Mode" on "app information". Personally I refuse to pay with the phone so I am okay not having that option.
If someone wants to try Graphene os maybe that option will work on their banks too.
In Spain it's not cheap.
Edit. And also local towns have rules, I can't just install one that have a device on the outer wall/window and I own the whole house, in the flats you depende on the community to decide.