Welcome to the forum, and I am sorry about your diagnosis. It is always a tough decision on where one should be. My husband is from TX, and after we married (7/11/11) was going to immigrate to Canada before he was diagnosed. After diagnosis, his ex-wife felt he should stay in TX so that his kids would be able to see him for the time that he had left. In 3 months they did not phone or visit, except his youngest daughter who came when called to get groceries. He had brothers and sisters there, who also did not visit or call. I decided that he needed to come to Canada, as no one was taking care of him at all, and he wanted to be with me as well. 15 months later he is almost a total quadriplegic, and his youngest daughter lives with us, and goes to college. His youngest son comes for summer holidays, and neither of his older kids have visited even though we have offered to pay their way.
What I am trying to say is that you know your own kids, and if you don't think they will be helpful go to where you will get help. There are some really amazing kids out there who do help with their parent that has ALS, but I find most young people are pretty wrapped up in their own lives. My sisters, have been 100 times more helpful than anyone of my husband's family. I'm sorry if I am sounding bitter, but I hate seeing my husband hurting, and disappointed in his family. Our church has also been extremely helpful.