A pulse is a good start.
I've never employed but it's one of those jobs where if you take on someone who is any good, they don't stick around as they start up on their own (hopefully without your customers) OR they don't crack on with the job and you have to always chase them. The gap in the middle of those two extremes is very small so you must be selective IMO. Someone who is reasonably fit, of fairly mature age, who hasn't got big financial responsibilities, can drive, isn't a drunk or an excessive drug user, whose only police record is either long ago or "Message in a Bottle" ("Walking on the Moon" will do), who is prepared to take a low basic and make his/her money up with graft, who doesn't have any interest in running their own business and who seems reasonably trustworthy.
If you find one let me know and I'll vote for him/her at the next election.