I am thinking about making something that would come close to Final Fantasy 9, how much time would it take to create game like that with today's technology, but keeping everything at more or less basic level? As in - nicer looking game, no fixed camera, simple collision, same dialog system, probably same combat system, no hardware intense shaders, simple 3d sound.
Since I will probably be making my game(s) alone, I am not planning on making this game with 50 hours of content like original FF9.
Very Rough numbers based on the original FF9 credits:
About 20 work-years of production time.
About 15 work-years of design time.
About 60 work-years of programming time.
About 80 work-years of art and modeling time.
About 80 work-years of animation and effects time.
About 50 work-years of audio time.
About 100 work-years of QA time
Lots of licensed middleware, engines, and tools.
Costing about $40M.
Making the world slightly smaller and making the quest more compact might save a few thousand hours, maybe drop the cost by $5M or so.
If you were doing a direct port and had access to all of their resources you could reduce the 210 work-years of art, modeling, animation, effects, and audio. You'd still need a tremendous programming effort to port it, but it would be cheaper.
Games like Final Fantasy or Halo or WoW are epic works. They are the pinnacle of the art and the state of the art when they are released.
Yes, it has been a decade since FF9 has been released, and some of the things are easier today than they were years ago. But the work is still immense.