Frontline- "Lost In Detention"

Facts:
1.) 20% of immigrants in Illinois county jail were considered "undocumented"
2.) Obama deported over one million illegal immigrants in the time of his presidency
3.) Illegal immigrants and workers are often paid less than minimum wage
4.) For instance, the legal american workers taking the places of illegal immigrants picking veggies, made money per bucket.
5.) 400,000 illegal immigrants will be deported in the year 2011
6.) There are four and a half million legal american born citizens with illegal immigrant parents
7.) About 36% of illegal/undocumented immigrants are deported with family
8.) These illegal immigrants were found and deported by authorities at times, when they weren't even doing anything wrong (changing lanes without a turn signal)
9.) The united states alone has 250 detention centers for these cases of illegal immigrants facing deportation
10.) Despite efforts of politicans in Southern states, the economy of their agriculture depends on the back breaking labor of the illegal immigrants low waged work.

Q's:
1.)  How much on average would an illegal immigrant make for (X) amount of (Y) kind of work?
2.)  What happens to children who are illegally in the country but with parents that became legal?
3.)  What is required in the process to become "legal" in the US.
4.)  Why are southern states jocking against the illegal immigrants work/labor which mostly benfits them?
5.)  Economically, how much money would or could be lost if all of the illegal immigrants were forced from the country... completely leaving the labor to legal citizens?