Double it - at least - for fiberglass decks.
Increase by an order of magnitude to replace the teak deck.
I wouldnt be having the work done in the US. Here in Guatemala the daily rate for labor is $13. That's for 8 hours. So double that, let's say $25 per day. Hire four people. So $100 a day; I dont see that taking longer than two weeks to have the decks up. Sure lots of other work to do. As i said i have a friend, who also is a marine engineer, that had his Baba 40 done here for $7k. He was very happy with the job done.