Man kann ja sicherlich noch einige Dinge von der Steuer absetzen. Wenn man nur Kapitalerträge hat würde man ja nur 25% steuern zahlen. Davon kann man mindestens mal ein Arbeitszimmer und einige Versicherungen absetzen. So landet man dann schnell bei 24%.
Assassins Creed 1&2 are not really open world games comparable with BoTW or ToTK. The world is much smaller and everything is far more linear. The combat system is also not extremely great. You can mainly just wait for counters constantly.
That said, I still enjoyed the games (especially 2) a lot. But it is more the fun climbing action and fairly good storytelling.
Skyrim might be possible, but I have not played it personally. The witcher is available on the Switch as well.