VPS + Plesk + SiteBuilder - Requirements

[steers]

Hello,

I am interested in purchasing a VPS with Plesk, SiteBuilder and Virtuozzo installed.
Could you please let me know what are the minimum hardware requirements as for RAM and CPU ?

Is is possible to install cPanel/WHM with SiteBuilder ?
Do you know the hardware requirements for such configuration ?

Your help would be highly appriciated.

Best Regards,
Steers