Thats a fuck-ton of cash.
But the problem is, the chances of Joe Indie game developer achieving this are close enough to zero as makes no difference. There are 348 pages of ‘top sellers’ on indie games on steam. Taking the mid point, and looking at the top game (I wont pick on it publicly, so lets not name it). Its an RPG with Zombies in apparently (that shouldn’t narrow it much :D). Steamspy says…. drumroll