You have unlimited funds in this scenario... but you have no toilets available ! And no way to set your research priorities ! So finish off the coasters, sign the scoreboard, and leave ! The Vertical Roller Coaster is easy as pie : give it a lift hill, a brake-before-fall-section, a good vertical drop and then the few missing rails. The Steel Twister Roller Coaster will need a bit more : a few batwings and butterflies taken at reasonable speed, and back to the end portions.