If blue states can build enough housing to welcome refugees from collapsing red states then great. Caring for people and building bigger concentrations of healthy people is a good thing, especially as the House is proportional to population.
I am resourced (out of luck), but also high empathy and intimately familiar with the struggles you mention. The bet isn't only because I can afford it, but because I am so familiar with the data I know I'm right. This is why I am for universal healthcare, see no other path forward, and I hope this better explains the mental model my arguments in this context are based upon.
I mean, same position here. I just don't have $10k to sit in escrow for years. I've similarly got plenty of first-hand experience; one on Medicare and one on Medicaid in the family due to disability, and even with those and a reasonably well paying job we'd absolutely consider moving for a program as described.
Data-wise, we've already got quite a bit demonstrating that California's better-than-average social services are more attractive to homeless folks, to the point where they have ~25% of the country's population of them.
I'm also for universal healthcare. I just don't think doing it unilaterally at the state-level is likely to work very well with freedom of movement between states, as with gun control.