In all seriousness, buy a goat. Ate you using a tractor to build with or a dozer? It really makes a difference when building. Making the tabletop shorter and cutting it out later is a sensible way to get going. You can add the removed dirt later on the landing and to reshape the takeoff.
If you are using a tractor, use extreme caution. A former top SX rider lost his Dad working his practice track with a tractor in a roll over! Check the the bio of Trey Canard.