Moderator: Thread moved to the Cloud Foundation area.
For Management domain servers, single CPU per node is supported for Hybrid configurations in 3.7 or earlier versions and for both Hybrid/All-Flash in 3.8 and later versions, as you can see from the documentation this changed in 3.8 (and onwards):
3.10 (same in 3.8)
And as mentioned here:
So, the main point here is that vSAN ReadyNodes are going to be used here and you will see that the only current ones (that I can find anyway) with single-CPU are AMD as opposed to Intel - A lot of these have far higher core-counts and thus you should be mindful of costs here - while you may save on a CPU, current VMware licensing is that for any product (including both ESXi and vSAN) that is licensed 'Per-CPU/Socket' that this is capped at 32-cores per license, e.g. if you have a 48 or 64-core CPU this will cost the same as a lower-core 2-CPU configuration for both ESXi and vSAN licensing.