Or maybe I didn't know that this had been posted before. A colleague sent me a link to it today, I thought it might be interesting to this group, and I posted it. Feel free to mod it down all you like. Having high karma on Hacker News is not a high priority in my life.
To tell you the truth, I'd feel like a nut case saying something like "You are my favorite company. It's my dream to work for you. If you have any aspect that could use a little help, let me do it, and I promise you it'll thrive. I'm that passionate about this."
Watson's bedroom was presumably on the floor above the pictured floor. (They also don't show Mrs. Hudson's bedroom.) Watson moved out pretty early in the series after marrying Mary Morstan.
So, he's basically saying that the net worth of the U.S. is negative, which, of course, is a very bad thing. Which means it's impossible to pay it off right at this moment, of course. I'm not sure why that implies it can never be paid off, though. Not that that makes the situation much better, though.