Can be pricey - due work time and potential risk of fail on big piece of material. Imagine you have this size piece of quality wood, and after five and half hours of work something fails. It is not 20x30cm piece, but way bigger. And labor and lost material risk is combine. Many companies charge $60-70 per hour of work. If risk is high - probably it can be multiplied by "risk factor". But this is only my point of view.