What are the effective slow steps of leaving this cult?

I have already had some dirty fights with my family regarding me not wanting to be a part of this cult anymore. My mother is still willing to listen but my father literally threatens to cut all ties (which I don't want as they are getting old and I don't want to leave them hanging after all the things that they have done for me). They give out dasond on my behalf, which defeats the whole purpose as I will eventually have to fund their retirement. The only step that comes to my mind is not marrying a ismaili so that eventually after their death I will have some freedom financially, emotionally, and spiritually. What are other ways in which I can slowly escape this cult. Please help a fellow comrade!