I like your project and I would love to work on these characters, but I have only one question: you are providing concept art of the character or I have to make the concept? if I have to do the concept, the time for delivery of the work will be much higher than I planned
My workflow is this:
> Base mesh for body in Blender 3D
> Sketch 3D (body, face, hair, gun, clothing etc) in Zbrush
> Your revision requested
> Details of all in Zbrush
> Your revision requested
> Low Poly mesh in Zbrush
> Bake maps in xNormal
> Building the hair in Blender 3D
> Texture all in Substance Painter, dDO or photoshop.
> Your revision requested
> Finish texture in photoshop
I can deliver multiple maps as normal; diffuse (or color and ambient occlusion separately); specular, roughness, height, reflection, gloss etc, but if you really just want to single texture... I can do this. And I can do all requirements of building low poly mesh.
I really like to work on this character, so ... hire me!
(and sorry for my english)