450k man hours = 225 people full time, 1 year @ ~ 70k a year = 15m
They added 34 more suites * 2 people * $1000 per person per cruise week = 78000 more per trip
~200 trips to pay back the cost - not sure what the utilization of cruise ships is usually, but if they do 40 packed cruises a year, they're at a ~5 year ROI.
I guess I forgot the cost of the new section itself, but I'm going to guess all in, < 10 years ROI?
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
- Design time
- building time
- "fit and finish" time etc
- cost for all of the above
It's very possible the cost (or even ROI) would be larger(longer) than your calculations.