How many programmers realistically would it take to make a high end game in UE4?

Good to know. I know the high end programmers make is anywhere from 80-100k varying, I was just trying to figure out the floor. Thanks.

Is anyone here making an RPG that could provide any input on time or what their staff looks like?

Thanks for everyones input so far, and for being helpful to someone whos rather unfamaliar with this information.