Will there be enough work or guaranteed work to cover 7/24 instead of mining?
No, They explained it earlier, They will use mining as a backup, So when there won't be any jobs running, The software will mine for you. Expect most of the time being spent on mining. An Average commercial would take a mere hour or two to render with 100 GPUs. As I said in my previous post Unless they land every single Animation studio out there, there isn't much stuff to render.