its okay to leaflet yourself if you have no work,otherwise its hard on the feet
i paid a big woman to do mine,then once she moved,i found 2 girls. if you pay ,one tip is to only let them do 2 hours max each time ,so they arent slowed up and then lose enthusiasm. also be sure to tell them a price for when they get asked.i picked an average price to say every time (later can backpeddle if the house is big )
i paid them a tenner per hour at end of each day .also gave them a local streetmap and marker pen to colour in the streets as they go
one thing for sure ,the risk of a dog bite when leafleting is high,a gamble