Helicopters are expensive, but there again their abilities are unique.
They cost more to build and maintain, but once you have savoured the flexibility and thrill of helicopter travel, they are worth it. Best to compare helicopter costs with small business aircraft, not light singles.
I own helicopters, so well aware of the costs, but have also chartered them and find big differences in what people charge. And, some companies that offer charter, prefer to make their money elsewhere and charge accordingly.