whos to say you cant start it and show what your progress is to somone in the games world when you get there though?
theres no point not starting an idea just because its too big.
Everything in gamestudio is do able, weather you have the time and skill to do it is another matter.
Isnt it best to start something and get half way of doing it well then to not start it at all and say "I had the idea"....
Try it, attempt it, you might supprise yourself.
Theres no greator feeling in the world to create something and get it interacting in a virtual enviroment.
I say give it ago, even if it takes u 15 years to make atleast you can say "You did it".
nomis.