CC usually has a 7 year limit to post in a thread (then they usually lock for read only) but this one is being resurrected occasionally to prevent that.
Not sure where you are seeing that but none of the Q class ships should have that as obstructed nor is that cabin 4D.
Look at cruisdeckplans for pics/video to determine bed placement (they alternate down the hall).
The breakeven point depends on the discount in the planner, but it's around a 7-day sailing for a couple (use one for the second day and the second one to discount the remaining days package).
Some yes, especially in 2022 when there was lots of inflation.
Biker, who sold his fairly routine Voyager one for $120, though the rest averaged $50 or less.