Question about professional modeler/animator

Hi,

I am currently developing a virtual agents platform using the Unreal Engine to help elderly people suffering from dementia (in a French hospital).
As believability is a key feature in this topic, we may need a good modeler and especially animator to create the agents. In fact we want a set of morph targets, clothes,… to be able to edit our characters like in the Sims game, facial unit actions’ morphs and some basic animations to get started.

So my question is: what is the average salary for that kind of job and how much time it will take ?

Thanks !