Have a look at this, it will give you some idea:
It's summed up pretty well in this statement:
My MacBook Pro has 16GB of RAM, which is barely sufficient to run a core lab provided that I shut down absolutely everything else and am very patient while it builds.
Keep in mind that you will at least need a couple of ESXi hosts and a vCenter. Ideally a domain controller, shared storage appliance and a router.
You might be able to fit all of the above into 16GB of RAM. But adding NSX Manager, Controllers and Edges into the mix will be tough. I'd suggest 24-32GB to be able to run this.
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VCIX-DCV, VCIX-NV, VCAP-CMA | vExpert '16, '17, '18
Blog: http://niktips.wordpress.com | Twitter: @nick_andreev_au
