Well, you know, I think I can make a simple game that allows users to buy trains, and then have them ride between two pre-entered cities and change ticket prices. That would be IM basic. That, I could do within a year quite easily. That said, if you wanted multiple cities, or any kind of more dynamic gameplay, it would take well over a year. It just won't happen. Look at AM, which with multiple developers having worked on it for a period of three years, is still not completely finished, and most likely will never be. Games take time, especially when you have volunteers working on it who have other jobs, and lives and stuff to take care of.
