What is it that your brother does or wants to do? 32gbs of ram except for people running heavy virtualization or rendering is just way, way overkill.
Fanless cards may be quiet, but often the temps are really a very solid point to avoid. A relatively low power card like you would get at the 400$ budget, with anything but the worst cooler will already be far quieter than most cpu coolers and casefans alone given the fact modern cards only spin up once they reach temp.
A relatively quiet case, + a decent cpu cooler + a low power card and + good casefans will make for just as quiet a system as any fanless card to the non-maniacal.
The oldest that belongs to me is a beated up lenovo ideapad 100-15ibd that I got for 50 bucks that got some love (upgraded to 16gigs of ram and got ssd) and now I use it as a htpc.
The one I used the most is a razer blade which I accidentally broke the keyboard and now the sits comfortably behind the TV.