confused on what to purchase/really need help

my sister is an architect she needs a new device currently she using 17 16gb ram with gtx 1660ti 6gb laptop she renders a lot is buying a pc or laptop better which graphics is better budget is around 70k a little flexible she has a 1440 32 inch monitor i know its cheaper to build it by myself but idk which motherboard,ssd,ram to buy,she also like to play elden ring but current laptop not good enough to play on 2k resolution