It seems the coaster is supposed to be 500m high at it's peak. The tallest coaster in the world is 112m high (with a planned one almost 200m high). Might need some engineers on our project if we are going to reach 500m.
I'm not a roller coaster engineer but I'm pretty sure we could achieve the same speed that starting at 500m would give us by adding magnetic launchers for the entire first drop.