If youre fine with having to independent island which you have to manage go for the 2nd. essentials bundle. Its cheap and gives you 3x2 CPU ESXi Hosts and a vCenter instance for up to 3 Essentials Hosts each. No you cant add a 4th. Host to the vCenter Essentials
For managing 4 Hosts
- vCenter Foundation
- 4 ESXI lics (Standard or Enterprise+) for four single socket Hosts or 8 LICs for dual socket systems
For managing 5 or more Hosts
- vCenter Standard
- Right number of ESXi lics (Standard or Enterprise+)
Keep in mind that vSphere Essentials is the one and only license which doesnt "need" buying Support and the Subscription is cheap as hell (65 bucks per year).
Stay below 32 Cores per Socket otherwise you need to double the licenses.
Regards,
Joerg