Someone said it was the end of a chapter, and I'd like to agree with that in a sense.
There are a lot of loose ends to wrap up from the first "chapter" which is the main purpose of this part.
I could give you the entire outline I've got planned but spoiler and stuff.
There are a few reasons why they will be living with Sarah and Mark.
1. Their apartment is a little shabby (it's supposed to be anyway)
2. They don't really have a job.
3. A pipe broke in their apartment, flooding it with water. Who knows how that happened.
4. It's the best choice for the game.
5. Probably more reasons and stuff.
Yes, that's to be expected, better to increase money in that case.
It removes repetition, some scene will grant you a large number of affection on your first go, instead of 1-5.
It is quicker, but it also sets everything out of sync, it doesn't make it easier to know what to do next, you'll spend more time waiting too. I might add an option to skip a whole day at some point, but I need some feedback on the story mode option.