[throwaway201606]

The ship is a luxury cruise liner: the article, somewhere close to the bottom, says "Pricing for the 7-day cruise starts at $5,600 per person"

that 'starts" in the last part is kinda-important ... I took a look and they have 1 week cruises for $22,000

So, its really more like

34 more suites * 2 people * $5600 per person per cruise week = $380,000 more per trip at the low end

34 more suites * 2 people * $22000 per person per cruise week which is just over $1.4M more per trip at the high end

Assuming $15M from the 450k man-hours and $23M in materials for the retro-fit, (seriously over-estimating materials because I want the nice easy math that goes with a $38M total), it would be:

- 100 cruise-weeks or about 2 years to re-coup at the low end

- ~30 cruises (not cruise weeks, literally cruises ) to re-coup at the high end