Redundancy/Backup of Terminal Services on Vmware

hi guys

we're about to virtualise our Terminal Services server. Seeing as TS will be running on Vmware, what's the best way to make sure there is redundancy in case the physical machine one day dies on us? Should I do some sort of mirroring every night onto another server? If so, how?

p.s -
I'm not looking to purchase ESx as it's too much and we won't need it on such a large scale as yet. Therefore, it's going to be Vmware Workstation/Server for now.  

Thanks guys
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