Jesus, that waterblock. I know shopping for them might not be noob-friendly, but thank God for Barrow and Bykski for us with slimmer walletsWell.....
EKWB CPU waterblock - $110
EkWB 480mm radiator - $100
Corsair 420mm radiator - $80
EKWB RGB res - $80
EKWB Quantum Aorus GPU block w/backplate - $236
Thermaltake Riing Plus 120mm fans (x4) - $130
Thermaltake Riing Plus 140mm fans (x5) - $150
Miscellaneous fittings - $130
PETG tubing - $40-60 (I messed this up here and there.)
It can be done for less of course. But it can get expensive. It will nickel and dime you if not carefully planned.