bluekangaroo i wondered the same thing about the house - so I went back to TIA to check. It's a different front door and so a different house, unfortunately.
there was something a bit "errant parent buying off the kids" there imho - i mean he could have just dropped them back at their own house, but no he gives them a nice new posh one and rory the car of his dreams instead....
i know 10 gave donna a winning lottery ticket but that was kind of anonymously done and it was underlined that she and her dh were not the greatest shakes in the financial management department so it gave them a boost. whereas this was a bit "grand gesture", which would indicate some form of guilt. then again, maybe he's just trying to keep the nightmare IL's happy 
dylthan and med i also wondered about the nail varnish as it was so shoved in our faces at the end of TGC - but then my head exploded with the possibilities! no doubt SM is killing himself laughing somewhere at so many people obsessing about bow ties and nail varnish!!!
and migrating - kudos for outsourcing bow tie watch to your students 