Keeping the price of labor down is exactly what they're talking about. She knows that illegal immigrants providing cheap labor won't affect her wages and allows her to hire people to do manual labor for dirt cheap, so she accuses people of being xenophobic racists if they aren't fine with exploiting illegal immigrants to provide cheap labor.

Huh? She's trying to highlight the hypocrisy in people who want border walls but then demand those services at cheap rates. This is nothing specific to her own thinking and want of cheap labor. It's purely calling out the conflicting stances.

And once again the kind of people who hire others to mow their lawns or deal with their kids won't have their own wages affected by the cheap labour those illegal immigrants will bring.