I've read this whole thread from start to finish, and I must say there's plenty of negativity in it. If he wants to attempt an A, AA, or AAA title, then more power to him. The only real problem you have of doing a project of any size in any amount of time is you. And if you spend a while on a project, you will definately get to the "I don't want to do this anymore" point. Even a short one. I made a small puzzle game in a month in C with directdraw. It had music, sound effects, and art all done by myself. It's nothing to speak of, in fact I don't even think it's very fun, but it's finished. But even on that 4 months, I got to a point where I just didn't want to look at it. But then that's the point where you say, Okay, i'm going to work harder now, this is the hump, and i've gotta get over the hump. That's all there is to it.
Even something very simple can look like doom 3, if they haven't done it before. And you're always learning, so if you have to learn something to make it happen in your game, then you do it. And yes it will take time, that's a given. So with that in mind, you can make anything you want, just as long as you don't quit. It could take a short amount of time, or it could take years, it doesn't matter, if you don't stop you'll have something complete, and maybe even fun to play. You might even sell a few copies, or you could sell millions of copies... Point is, it doesn't matter, as long as you're doing it.
2c
Even something very simple can look like doom 3, if they haven't done it before. And you're always learning, so if you have to learn something to make it happen in your game, then you do it. And yes it will take time, that's a given. So with that in mind, you can make anything you want, just as long as you don't quit. It could take a short amount of time, or it could take years, it doesn't matter, if you don't stop you'll have something complete, and maybe even fun to play. You might even sell a few copies, or you could sell millions of copies... Point is, it doesn't matter, as long as you're doing it.
2c