The main problem is that WIndows in qemu doesn't get virtual hardware acceleration and there is no customer SRVIO GPUs, so you need to waste a GPU with the VM or buy an enterprise one and visualize it.
Some dude started working on it almost half a decade ago and silently dropped it.
Anyways, just get a cheap GPU to pass it through if you don't need anything GPU heavy.
Problem is Windows is a mess and even the basic shit kinda demands a GPU.