Kyle's assets are tied with Mauricio which is why it is so high. And let's be honest, how long can she live off RHOBH when she has such an expensive lifestyle.
Making a lot of money means nothing when you blow most of it. Look at the way she went from normal housewives to keeping up with the Jones type of housewife when Erika appeared. Also, I do not know of you follow them on social media but her daughters and her are always head to toe in expensive clothes, travelling to expensive places and all via private planes.
She would be worse off than Erika if she left Mauricio since she has her 3 daughters to take care off.