Convincing them to get frozen is hard enough as it is...I'm up against belief-in-reincarnation for at least 40% of them.
Also, I myself doubt that completely uprooting the life you do certainly have, in exchange for a shot at immortality which has a high likelihood of not actually working, is worth it. There are established business in place, and losing proximity to extended family together is a huge deterrent, even for most of the younger generation.
At best, it would be worth it for the very oldest relatives who are nearing the end of their lives...but those are both the hardest to convince ideologically and the ones who are most attached to the family infrastructure to survive and the ones for whom the nifty life-insurance trick doesn't work.
I'd still try to convince them, but the likelihood of me succeeding is reduced with each additional deterrent. I'm looking for a way to remove at least some of these deterrents before making my sales pitch.
I don't know your family, obviously, but my prior probability is that migration to America would be an incentive, not a deterrent. The reason bringing relatives from 3rd world countries is such an studied problem is that so many people want to come here.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.