please is there any tutorial on how to obtain & setup OnApp Cloud to work for two virtual private servers with cpanel?

Limitation of free version
I found i cant use OpenVZ, but XEN only in case of Free OnApp cloud version.
Also Free version is limitted to 16 CPU cores in total.

I would like to give more redundancy/uptime to the hosted cPanel accounts..
Can i get it? How it works while having just 2 VPS used for webhosting?

Thank you

One can try OnApp demo here: https://tryonapp.com

OnApp free alternatives:
CloudStack: https://cloudstack.apache.org
OpenStack: https://www.openstack.org (Lobster is system that works for it, Lobster support PayPal and Coinbase)