Nick won't be able to inherit his Grandmother's money for these reasons;
- Nick is thought to be missing at the moment
- the only ID that can identify him after his makeover is the passport of a Mexican Young Woman
- in Mexico he will learn espanol so well that it will become his first language and only able to speak a broken-english due to the accent he will develop (like the Trios of Latinos Women, Maria-Lola-Talia)
therefore, in the end he won't be able to prove his Identity as Nick, the Nephew of the Old Lady and all the woman money are gonna ends up in his Uncle & Aunt hands
i don't know if i would like the possibility that Nick's Aunt & Uncle weren't talking about getting rid of him and that it was all Nick misunderstanding. I'm saying this because he didn't hear them saying his name when they were talking with the Lawyer.
LiltKit's stories have all a happy ending but for this one, i'm unable to see how things will get solved. One thing that i hope is that Nick gets revenge against Sam and her Crew, maybe do something to would get rid Sam of her beauty, like making her looks older (example)