@Jo***
, The reasons they put on the denial of enter were the reasons I posted. I can't give you any more information than that.
The clause 2 says they have no booked place to stay when they are here, meaning they didn't have a confirmed hotel booking or proof of lodging.
Clause 9 said they have no way to support themselves while they are here meaning they did not have sufficient funds in the eyes of the immigration officers.
Did they have 20K baht in cash, a confirmed hotel booking AND proof they were going to leave the country within 60 days?