Hey Cupido ~ glad to help !
Once you have all the posts threaded with the wire, you can just roll them up and keep them together that way for breakdown and storage. I'd say it would take about as long as it would to put up a big crew's weather shelter with a couple helping hands, so...eh, half-hour on sand - hours of frustration on rocky land?
The key is to not cut the mesh wires right at length so that you can adjust larger and smaller as the camps change. There's definitely a chance of shock and perhaps shorting out if you let the alternate current and ground wires touch by not having the fence tight enough - similar to jumping a car. But, all in all, as long as you have something to keep the battery out of the weather, and someone keeps their wits about them so they pay attention to the details during set-up, it's not rocket science and shouldn't be a big deal.
Make sure you get the attachments that help facilitate a door for entering and exiting - plastic wrapped handle-jobber that let's one pole hang next to another without them touching. Don't forget the rubber mallet either!
One other point that popped into my head - we never had dogs up there - probably be a good lesson once and they'd stop running into it to catch the frisbee? hope so.