More money?
It's bloody expensive enough as it is. If you want to do large data centre then you need Enterprise Plus - and that costs real cash, shit loads of it. Add that to the SANs, switches, cost of racks in CoLo and/or your own machine room and IT is a major overhead. Then you need some OSs, apps, backup stuff, DR site.
Money pit - and a large part of it is the "v" bit - regardless of vendor.
Obviously you can always do the vCloud suite instead and PAY BY THE GB OF VRAM. It comes in three flavours or so.
el Reg - you do know about vCloud - don't you? ITS CHARGED BY THE GB.
Now install: 1x vCentre - 8GB, 1x Ops Manager - 8GB, 1x vNetworky thingie - 8GB + other bits - 8+ GB, Orchestrator - 4GB. You'll also need a vLicenser thing - 512MB (I think), assorted backup things. etc etc. That management cluster is looking a bit big now already and you haven't even deployed a customer VM yet.
Hilarious.
Cheers
Jon
PS I do actually like VMWare - I own a reseller 8)