if that being the case,

for clustering, if one VM required 4G and since in previous post by jasona.work that I need to set up 4VM,

wouldn't that mean 4*4G, i.e. 16G of RAM since I need to allocate some RAM for my host? I don't think I have seen any laptop specs that provide more than 16G of RAM.

Is there any compromise for domain controller and filesystem?

thanks a lot!