Optimizing DR

As Neilg mentioned above, such number of render frames are more suitable for network render instead of DR one. But there is a lot of hand work to setup different jobs with all scene cameras.
Animating one camera to cover all views is an option too, but again it requires a lot of adjustments and additional work.

Perhaps one good approach is to use batch render to setup all render views and send a backburner job from there. Then you will get a queue with all render views, that could be rendered on multiple machines or single one with DR enabled.