7 to 8 days is a reasonable timetable if he is completing all of the rigging, skinning, facial, and deformation setup. When it comes to animating and the final aesthetic of the piece, the time invested getting the deformations just right and designing a sturdy rig will more than make up for it.
The rig should be capable of handling nuanced acting shots, as well as realistic body mechanics and cartoony motions. Stretchy limbs, as well as squash and stretch controls, can be used to provide animators the freedom to exaggerate their animations as desired.
There are different ways to rig a character, but they all have one thing in common. They are all fictional.