It seems that GI isn't willing to reduce prices permanently in regards to increasing the production of the utility buildings (flight catering facility, laundry facility, sweets factory, furniture factory, and pharmaceutical lab), so a good compromise would be to offer a sale where prices are 50% off just like land expansion. They could do the sale every two weeks along with land expansion, or maybe even every month. 60 greenies for the pharmaceutical lab is still pretty steep for a silly sleeping pill, but it's better than the 120 greenies they're currently asking.