This is called a commission bid. You are being asked to engage in major commitment for an extended period of time. An initial quote in the 5 to six figure range is not out of line. Yes, I mean approaching $100,000.

The liability in many states for this type of work is now in the $10,000 plus range yearly. You are not only covering you workmen's compensation (I believe your state enforces it) but the liability if you break something on the work site like, in this case, a piece of electronics gear, knock a decking tool over the edge, or god forbid do something that injures another worker. See a commercial carrier.

Plan on purchasing two cameras just for this job. You should also have a dedicated notebook and an extensive backup plan in place. You don't want to be without a working camera when they spin fiber, lay deck, crane in the engines, etc.

To give you an idea, 1 day on a construction site covering crane picks for lift slab construction of a 4 story apartment building I will gross over $1200 with one assistant. About 4-6 hours max. I am standing on ground, no high steel, no hazmat, or other hazardous conditions. All digital delivery now.

The general contractor may even be willing to roll your services into the overall project as they often like copies for future customers, engineering verification, and even insurancce documentation where the carrier does not come out and do their own onsite work.

The customer may want large prints, a bound book (or several for future guests on the yacht), or there can even be publication rights. People who build these do it for several reasons, many of which are based around a type of publicity.

Best wishes, I'd love to work on this it sounds, and please PM me or email if you would like with further questions!