I just finished modeling and sculpting mesh for main character for Batman Beyond game it is also optimized to 100K polygons.
Not everything is from scratch some parts of mesh was found for commercial use. Basiciailly it took me 2-3 weeks of hard work starting with basic knowledge of modeling.
For now I need to extract normals for high-quality texture and record some animatons in iPi Recorder and iPi recorder Studio for Kinect.
Good quality right there!