Because apparently I'm a sperg with no sense of what's good to do with my time, I went and screencapped Chris' addition to the town, the 'Krustyland'.
The friend selection screen. Here you can tap on either the town (which we've seen) or the park on top to visit that friend's specific Krustyland. Of note is that while the mini towns are not accurate, they DO change, and the mini towns we see for Chris are for towns maxed out, you can tell how both the other players on the left and right have differences in the port, and in the park, because Chris has been able to max out the decorations everywhere and has every building.
Here it is in all it's glory:
Here is the full size original, I hope.
You can tell that it takes many screens to screen cap it all, Chris' town is already maxed out in size, he has every plot of land you can buy, and you can kinda see that he's on his way to doing the same here as well. Not all of what you see is a thing you have to pay for, but he's still put a bit of money on it. I don't know if you can spot them, but the dudes in costumes cost about $6 each.
Some fun things from his town:
Disco Stu and the pet Iguana just came out, and look. Oh, everything Chris has paid to have on his town, I can tap and check out while visiting as well. So he's paying for mere animations and voice clips, but at least he can share with us :3 You can also tell how he's started to toggle all the xmas decorations on buildings.
The red grafffito on the school's ceiling is what it looks like when a friend vandalizes your building. so yeah, people have been going nuts with him. You can see the name of the person who vandalized you, though.