>>> So, am I good to go on this? anything else I should do and you suggest?
Sounds good to me so far.
>>> How many VM i should have the max on this?
Well, I think the limiting factor in this case will most likely be the disks. The 4TB HDDs are most likely 7.200 RPM NL-SAS or even SATA disks. Since these disks do not provide IOPS like SAS disks and - in case of SATA disks - a low queue depth, you may need to find out how much load the 6 disks/spindles can handle, and still provide the user experience you expect. One more concern about this setup is RAID5, and the required rebuild time in case of a failure.
André