Listen to Russ,to train them take one with you till he knows what he`s doing and up to speed then send him out with a list of work,to do double what you do now as a pair would be hard graft long days and pushing it,but with 1 doing half on his own and 1 doing the other half it`s a lot easier and double money day in day out.To see the real benefit of employing i would say it`s the only way,sending someone out on there own everyday i would give an end of month bonus to keep up moral though,find the right one and you can earn serious money.Forget the start up costs and other expense if you find the right person you`ll get your money back in 6-10 months easy,and from then on your profit nearly all the way apart from general running costs.