If I wish to move within the same apartment complex because of mold, Does a landlord have to get me a unit I can afford?

My lease is almost up. I want to move to another apartment same complex. Most other units have been remodeled and are out of my budget. I did not tell them about the mold because I didn't want people in my apartment I have a sick mother, an unregistered animal a cat, and the mold room is crowded with belongings. But I have kept good ventilation and sprayed anti mold solution regularly. With a sick mother it was impossible for me to clean out enough stuff not to be embarrassed. The unit I'm in is falling apart in other ways too. I don't want my mom to die a downgraded apartment. If I try to insist for a decent remodeled apartment at a comparable price will they just refuse to renew my lease period I.e kick me out? Do I have any rights?