CCIE DC exam (Written/LAB) ?

Hi, Anyone here working for their CCIE DC written or lab exam? Maybe you could answer the below question of mine? Thanks

1. Did you build you own lab or rent a lab? If building your own lab, what would be the min. pc hardware requirement in order to build a lab for DC?
2. What simulator did you use (GNS3 or EVE) and where did you get your image?
3. I f you passed the IE written dc exam u'll earn "Implementing and Operating Cisco Data Center Core" which is qualifying exam of DC lab right and this core is valid for 3yrs..so u can take the lab anytime right?

Thank you