What does one compliant project season in Norway actually cost?

Budget realistically: registration and setup, accounting with Norwegian filing rhythm, payroll administration per employee, HMS cards, possible VAT representative, and advisory hours for the setup decisions. For a small crew on one project, total compliance overhead typically lands in the low hundreds of thousands NOK per season — real money, but a fraction of one enforcement episode. Price it into the contract; the companies in trouble are the ones who priced as if Norway were Portugal.