adapters arent magically going to fix the driver issues. those usb-c ones arent really adapters, they have built in video chips. he'll also have to buy several of them and have several usb 3+ for them to work.
if your adventurous you could try these: https://www.reddit.com/r/XtremeG/comments/1c5ytz8/xg_nv_55222_desktop_win1011_x64/
(modded drivers, supports 700-4000 series)