I sat back, thought for a moment, and said, "Two years."
She laughed.
I'm still not sure whether it was directed at my naivety regarding the level of commitment required, or some Y-chromosome intuitive awareness regarding my plucked-from-the-air, over-confident guess. Well ...

... tomorrow is the second anniversary of this thread!
And in terms of total work I think I'm just past half-way.
Readers who are still awake will perhaps vaguely remember that I'd hoped to finish the deck planking by Easter: but I hadn't been informed Easter was so early this year*, so there's still some way to go on that front.
Andy
* Ok, so it's a lame excuse.
** I think I've another month of deck planks to do - the shapes around P and Q turrets have been as entertaining to plank around as I thought - but I'm enjoying it, and reaching a stage on the port side where it's pedal-to-the-metal territory across the boundless acres to the spurnwater at the edge of the torpedo net shelf.