Single-handedly, to get somewhere that project would take atleast two years of dedicated making. And there would still be graphics left.

But, as I personally like RTSes, the game should be made to space-time, but not overmade (like 2100 or something(war was beginning)). The game could take place in both ground and in space, with buildings in both (floating buildings in space). The objectives should vary through levels, like destroying enemy bases and defending your own base, and stuff like that...
IDEA. How about switching between third person for the overall units, and first person for Jazz? This would make the game original, and thus probably better.