Replying to Mexican laborers in the PNW

I may be moving up to the Seattle or pdx are fairly soon and will probly need help moving my heavy furniture in. Down here in good old CA I can just go down to the local home depot or Lowes to pick up a few Mexicans, pay them $20 each and I have 2 hours of help. I i heard this isn't the case in the great white north? Correct?

How should I go about finding a couple cheap laborers? Craigslist? Look for the least grimey homeless guy?