Want to employ a part time telemarketing person

I am thinking about employing a part-time telemarketing person. Having not employed anyone in this field before, I would be grateful for comments on:

• How the pay and commission should be structured - eg Minimum pay, commission per appointment and then more commission on client signing?
• Where on the net I should advertise the job (no agencies)
• Should I offer the person the flexibility to work from home?

I am well aware of downsides of telemarketing so I am not looking for comments on how terrible telemarketing is.

Thanks