No, but if you want you can get a VPS and install it yourself. Since they are unmanaged you will have to install and support it yourself.
You can view those plans here: https://clients.x10hosting.com/order.php?gid=6
For the backup, I think the firewall is killing off the process because it's using too much CPUTime.
For the PHP error, is it on your main sub-domain or another domain?
Should be all set, your VHOST for the sub-domain never updated, so I did manually.
Problem is solved, so I closed this. If it persists, please feel free to re-open this.