I take it you aren't a programmer. A full, working version probably only gets put together and compiled once a week, if that. I think you underestimate how many things in a game obey Murphy's law. With a daily build you would be lucky to get past the loading screen w/o it crashing spectacularly.
Once it is merely down to balancing unit abilities, sure, once a day wouldn't be to difficult, but when you are still digging in the code itself, not gonna happen.
