Oh, well, I still won anyhow.
We ended off with all hotels but 1 of them upgraded to the 3-star level (which, as you can tell, was owned by my older brother).
I had the one of the lucky route hotels while my younger brother had the other.
We all played this game strategically, although my older brother never got enough coins to play strategically.
I actually ended off getting all of the bonus stars at the end, and that's what led me to victory (the bonus stars were the shopping star, candy star (if that's what it's called for using the most candy), and the green star).
We also had about half our minigame be 1v3s.

2 of those times, it was my cousin going solo, and my older and younger brother did nothing at all and we still won.
There was also a lot of times the game really went out of it's way to destroy my older brother...
(My older brother started considering playing Mario Party 9 after that =P)
...they also thought I rigged the game somehow mostly because one time, when someone was using the twice candy, they first off rolled a 6, and then I said that the next number was going to be 7, and I was right. ;D
Fun game overall, though, and also extremely funny as well.