Got aircondition in bedroom (inspired by
@levelsio and more).
Price of AC unit and installation: €1800 (AC unit itself 800). Haier A2L.
Power price is around one euro daily to run.
Bedroom before today on regular day: 25 (!).
Was in Bali 18 days in June and slept significantly better there (measured by Oura ring) after adjusting for timezones.
Same wife, same kids, just AC on.
Now on back home as well.