for cpu yeah man its ez pz just buy 50 dollar cooler and u are good to go. but my main problem is the gpu (i wish companies would just sell us the PCB and let us choose what cooler we want just like we buy aftermarket coolers for cpu )While I think you can put together a respectable loop in your case for a bit less, there's a significant initial outlay. A decent pump alone is going to use up this budget and given that this is a long-term investment, I'd be looking more at pumps in the $250-$300 range.
I only do custom loops for friends/colleagues who really want it. For my own needs, I'm lazy so I'll use H100i or big air.
first i thought its going to cost 200 roughly 300 dollars and i believe its worthed in case i wanted to buy better cpu in future and do some overclocking i dont have to worry about cooling.