The heater is it Upper New Ark, not New Ark. You'll need a quality counterfeit pass (600 all told, 100 for a bad pass then 500 to fix it) plus money for the heater (1000 if memory serves), there's also a refinery (2000 gold) and another fridge (1000 gold) for the farm. Refinery comes into play when you need to get to the temple past the threatening plant.