He's not wrong.
Housing (homes, apartments, etc) are filled with illegal immigrants. Their standards for living are a bit less, and they have no shame shoving 12 people into a 2 bedroom apartment. Honestly I'm a little impressed by it, and quite honestly reflects what American's did 70+ years ago in many places.
That said illegal immigration has impacts on everyones daily life. Building growth hasn't been able to and won't be able to keep pace with illegal immigration. Illegal immigrants have contributed to excessive traffic on roads. Limitations and strains on public education systems and other social services. Often large percentage of money made by illegal immigrants isn't recycled into local economies, and often sent across the boarder to families. Interestingly, illegal immigration, especially in vast quantities, makes it harder for longer residing illegal immigrants to find work, as their wages, which increase with skill building, gets undercut by new illegal immigrants willing to work for less.