i agree with Mark. get on gumtree and employ 4 people to work 3hrs on a saturday & the same on a sunday, pick them up at a central point and drive them to an area away from home, then drop them off with a googleMap print-out of the area they are to do , pick them up 3hrs later. tell them you will call at 5 random houses on their map area that evening to check delivery
promise them a job and pay rise after the second weekend if they do a good job.... but sack them and get 4 more..... but illegal immigrant are the best to exploit, you can find them by going into the ghettos and asking in cafes.
drop them off in large villages or housing estates