7 hours for 30 pictures is not that bad - especially if you use ray-tracing. About 15 minutes per picture. If that is too long, you probably will need to reduce the quality a bit.

First of all - switch of the visibility for both normal and ray tracing for every body part which is not visible. Which hair do you use? If you use dynamic hair, concider switching to a conforming one - this helps a lot too.

Then tips for the render settings - fewer pixel samples, higher shading rate. Switch of "Smooth Polygons" if it is on. Changing the render settings will change the quality too - so see what you can live with.

Hope that helps.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

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