[Armando Guerra]

Using cheap labor. US fruit cannot compete with imported fruit.

That is the case. I think it is false to say U.S. workers aren't willing to do these jobs. In reality, it is that U.S. consumers aren't willing to pay for the produce at the prices that would enable the farmers to hire legal U.S. workers. Hence, the public instead will pay for Chilean grapes or Brazilian oranges picked by the cheap labor there while the U.S. farmers go out of business. An immigration crack-down won't affect the prices for produce, just where the produce originates. Construction will be a different matter unless we start seeing pre-fab homes "Made in China." Expect prices in construction to rise.

[Nathan Zachary]

There are plenty of pre-fab, or more precisely, "pre- engineered" home companies around. Your house comes bundled up on a flat bed truck, mostly all pre cut. Just assemble as per included instructions.
The only hard part is getting someone to pour the basement or foundation properly.
These are your basic 11-1200 square foot bungalow cookie cutter homes, but some of them actually look pretty good. A handy person can build one themselves, and keep contractor costs to a minimum.