The Smiley Smile Message Board

I've read that at the end of his life Dennis was homeless, which I think is really sad. How did this happen? Did he never buy a house from his income from the Beach Boys? Why did he not rent an apartment from his Beach Boys royalties? And why did his brothers not help him, for example through renting a small apartment for him? I've also read that he was kicked out of the Beach Boys because of his alcohol addiction, which is understandable. However, why didn't Brian and Carl help him financially or help him beat his addiction, e.g. by finding a good treatment facility for him? After all Brian (cocaine) and Carl (cigarettes, which eventually killed him) should have known firsthand how difficult it can be to beat a drug addiction.