All I'm saying is you need to make sure housing available. Otherwise the cost of rent skyrockets because demand outmatches supply. Similarly, when you have a lot of low-skilled labor coming in, the salaries for those jobs plummets / competition becomes tougher which pushes out locals. That all can combine to make the homeless problem and political problem worse (immigrants don't get to vote).
Now high skilled labor, that's OK. The salaries are already sufficiently high that down-pressure because of immigrants isn't an issue - it's skilled labor so you should be upleveling your skills such that you're not competing with "common" skills that are shared by more people.
> I'm saying is you need to make sure housing available
This isn't the story of Hoovervilles! There was enough housing. People couldn't afford anything because there wasn't work. (I agree with your take on skilled and unskilled labour, broadly, though with significant caveats, given how little we understand about those labor markets. Skyrocketing housing is an explicit American policy choice. We could change it any time, but we prefer to be wealthier and the "feel" of our neighborhoods.)
Not having enough work is what you’d have with an influx in unskilled labor.
Again. I’m not trying to say that immigration will cause Hoovervilles or that it’ll cause a similar situation. You’re correct - the Great Depression was a very different situation. I’m just trying to bring an analogy of a situation with some of the same structural similarities. It’s not a perfect analogy but it’s meant to highlight the risk of laissez faire immigration (which I’m generally more in favor of) coupled with poor planning / bad policies on the infrastructure side. I think we’re in agreement that there are structural risks at opening up the border in certain ways at the same time as we have a clearly bad housing situation and matching political crises.
Now high skilled labor, that's OK. The salaries are already sufficiently high that down-pressure because of immigrants isn't an issue - it's skilled labor so you should be upleveling your skills such that you're not competing with "common" skills that are shared by more people.