Unity 3D FPS MMO

We need someone to combine a group of Unity 3D prefabs and build ontop of that to leave us with the basic engine filled with npc, weapon etc templates so that we can work on integrating art and customising and duplicating the "templates" You would need to ensure that there are no conflicts between the prefabs, and also code bridges between each prefabs functionality according to our specifications a short list of what will be in the engine is as follows - -weapons system / ballistics (bullet drop, different classes of weapon) -simulated ecosystem consisting of representational values that dictate spawns in various manners -integration of vehicle, deformation, shatter/slice, blood fx, fluid simulation prefabs -creation of different classes of npc templates, each with different values that dictate behaviour -integration of mesh deformation / morph plugins to be dictated by dynamic code, applied to NPCs Ultimately we would like this to be an MMO with an average of 25 players per server. Please provide estimates for both a multiplayer enabled version and singleplayer, taking into consideration the main differences will be no human AI or human NPCs in the MMO version. Please feel free to offer a fixed price estimate if you prefer.