London,
Prices would increase significantly nationwide.
Immigration drives the American economy along with innovation and trade. Legal immigration is preferable, and finding paths for exiting illegals to be brought within the law is way preferable to deporting, which would be horrendous and horrendously expensive.
A splendid notion that Trump has proposed is to have foreigners graduating from American universities qualify for U.S. residency.
The long-term benefits of immigrants are that they contribute disproportionally to innovation and establish businesses employing Americans.
Best.