Installing nested vSphere 5.1 Essentials on 3 VMs

Hello.

I’d like to do the following:

1)      To install ESXi 5 on the server: 4CPU*8core each (AMD) + 32GB RAM. It’s done (ESXi 5.0 free)

2)      To set up iSCSI NAS on the separate box. It’s done too (FreeNAS, RAIDZ2 about 5TB, multipathing to the HV)

3)      To buy vSphere 5.1 Essentials

4)      To do like this:

Server ->

ESXi 5 32GB+4CPU*8cores  ->

                                                               VM1 32GB+2CPU*8cores each

                                                               VM2 32GB+2CPU*8cores each

                                                               VM3 32GB+2CPU*8cores each

5)    And to install vSphere 5.1 Essentials on these VMs.

The matter is: vSphere 5.1 Essentials has hardware restrictions - not more than 3servers*max2CPUs.

Questions:

1) Is it possible?

2) Should I update my ESXi 5.0 to ESXi 5.1 first?

3) How to split the CPUs for the VMs (must be (1,2) (3,4) (1,4) ?)

4) Is it better to use two VMs, not three?

5) Is it legal enough?

6) I must be need some masks for CPUs – where to dig?

Thanks.