According to this 2003 promotional magazine, the N47 has a mast-down air-draft of just over 15-feet. However......keep in mind the exhaust runs up the mast and is not easily laid-down. Lowering the mast might be practical for completing the Loop, but if you have a bridge you need to regularly transit, I doubt a dry-stack boat is the right pick for you. Also, keep in mind most N47s (and many N43s and N40s) were delivered with flybridges.
https://issuu.com/k-c-mediaworks/docs/circumnavigator01
A lot of speculation on maket influences when Covid declines. Quality boats sell well in any market; and Nordhavn have done an amazing job of defending their resale value so I wouldn't hold my breath waiting for a steal. In general, if/when the market aligns to a more traditional buyers' market, I would think the lower end will be the first to feel the pinch as that is where the new-buyers likely clustered.
Peter