We do have a few customers who run DayZ on VDS servers here. In my internal testing I noted that you'll want at least a three VDS as DayZ will use about two HT cores and then leaving the third for the OS.
I wouldn't expect DayZ to need an SSD anymore. I know there was an issue with a patch that caused heavy disk access but I believe that was taken care of some time ago.
<@TimeX-NFo> Hey, we used to have to carry our packets to the servers.
<@TimeX-NFo> And it was upstream, both ways.
<@TimeX-NFo|away> You're asking the old dude for help?????