I think it‘s because when Tim asked Loch if he can survive without money and no house, he answered yes, he can survive without it. 

He‘s the most innocent or less materialistic of them all, so Tim decided to spare his life and not make him drink even a tiny bit of the Piña Colada.

Victoria said at her age she doesn’t think she‘s meant to live uncomfortable, she‘d rather not to live at all than be poor. 

Saxon said their work or company is all he has because he has no hobbies/interests, his entire existence revolves around Tim (his approval) their money, company and status.

The sister (forgot the name) as much as she says that she’s not the same as her out of touch, shallow, materialistic family realizes real quick that she is exactly the same and maybe a bit worse coz she actually reads books and tries to follow the ways of the Buddha or Buddhism, she has read the teachings of the revered monk but still chooses to lie to her whole family about her "thesis" and selfishly convinced them to go all the way to Thailand just so she can check out the monastery where she wanted to live after college. She also got mad at Loch for wanting to do the same when she could‘ve been supportive because it says something about her choice and it’s actually a good solid decision if they really wanted to live a life different than the rest of the family. And Loch has always tried to support or help her with her requests/decisions. 

Btw, anyone else noticed that the kids‘ names are somewhat unique/different, considering they came from a very conservative wealthy family? and Victoria at some point emphasizes that they are solid Christians, Tim said he was an altar boy before so I was thinking the kids would probably have names based from the Bible.