The going wage for landscape labor here in California is $8-12 per hour. Carpenters $25-30 per hour. Concrete workers and roofers make $12-18 dollars an hour. All three of these class of workers are filled mainly by aliens, legal or illegal. Very few illegal aliens make less than or equal to the minimum wage, currently set at $7.50 per hour in California and scheduled to increase to $8.00 per hour on January 1, 2008. Official estimates of the illegal alien population in Calif. is around 2.5 million individuals in my recollection.