[thrownawaysz]

I can give you a list

Flight control https://www.thrustmaster.com/products/tca-captain-pack-x-air...

Flight control panel https://eu.winwingsim.com/view/goods-details.html?id=925

Light switches https://www.puairkorea.com/product/pu-autopilot-addon/

MCDU https://eu.winwingsim.com/view/goods-details.html?id=945

Rudders https://www.thrustmaster.com/products/tpr-thrustmaster-pendu...

Airbus Fenix remote on iPad https://fenixsim.com/a320/ + https://support.fenixsim.com/hc/en-us/articles/1245845642830...

16 key keyboard from Aliexpress, there are a lot of sellers

The rest are a beefy gaming PC

If you don't get the rudders then the whole thing (minus the gaming PC and iPad) can be bought for less than 1000€, even less on sale or second hand.