The 1st thing to understand about Moho is that, due to its rather steep inclination, not all transfer windows are created equal.  Transfer windows are determined simply by the relative positions of the 2 planets when looking down on the solar system from above.  This ignores the 3rd dimension.  Moho is often far above or below Kerbin's ecliptic plane and the greater this distance, the more dV you have to spend on the transfer to account for its inclination.  So what you want is one of the RARE w