Well, is not the op at fault here, the media says "bitcoin miners" as refiring to mining in general and common people believe their gpus can be used to mine bitcoin and then they come here believing they can get rich fast with 1 or 2 gpus, it's hilarious ehhe
those days are looooooooooooooooooooooooooooooooooooooong gone. even if you mine with a few gpus back then you should have hodl for a few years to make a significant amount of money.
If he likes gaming and wants a killer rig:
with 2 gpus and a ryzen 9 3900 with 64gb ram nice ssd yada yada yada
He can use 2x 3080 = 1400-1500 usd if he can find them
quality nvme m2 1tb for 200
64gb ram for 220
good platinum psu for 200
mobo for 150
case for 100
cooler for 100
comes to about 2500
rig will earn 5-6 usd a day with constant mining , but this is really a lower high end full purpose rig.
in 450 to 500 days it could be paid off
a true high end rig
threadripper 3970x 1800
2x 3080 ------------ 1500
128gb ram --------- 440
hi end plat psu ----- 260
mobo --------------- 420
case ----------------- 100
cooler --------------- 100
total 4620 earns about 8 usd a day due to the cpu mining xmr
nets about 6 a day with power so in 770days it good be paid off as 770 x 6 = 4620