UE the best tool to develop my project?

Sure I’ll ask for help, I’ve already contacted one really good 3d artist in my country. All depends on costs, so I’m trying to assemble a pipeline where I can manage most of the tasks.
About animator: in fact I think we will use characters, since Kinect input will animate characters that will be not visible in fact but will interact with all the other digital elements flying around. Meaning I need an animator or not? Also animator is needed normally only to animate characters? Or might I need it also to animate the other non-character elements?