Dabney is not married but has a boyfriend. Tinsley was upset in one episode that Dale made him a Christmas stocking and not Scott. Not sure if he’s the reason Dabney doesn’t have to work. I don’t really believe Tinsley or Dabney have that much of a trust fund since their father supposedly drunkenly spent a lot before he passed and Dale had to intervene.
Mario’s girlfriend dumped him and maybe that’s why he’s hanging out with Ramona so much lately.