How much resources take your labs in in GNS3 and other related emulators?

Gonna upgrade my pc soon. At work using EVE-NG but the client-server solution won't last too long because of a sys admin that will convert my ESXi lab into Hyper - V

So I'll learn at home and wanna know how much strong computer do I need - how many cores and especially memory.

BTW, still beginner but once I'll be advanced, too