Premier Fencing prices (as per my most recent catalog, but you could look at Premier1supplies.com) (shipping at least used to be free if you ordered via their website) (note that this is the brand most poultry suppliers carry, and is cheaper direct from Premier):
for 30" electronet: $110 for 82 feet
$130 for 164 feet
for 48" electronet: $104 for 82 feet
$155 for 164 feet
for 48" 'permanet' (stiffer posts, not meant to be moved place to place):
$63 for 25 feet
$87 for 50 feet
$135 for 100 feet
www.kencove.com sells a different brand of netting, and with a baby sleeping on my left arm I think I'll let you look their prices up yourself
One thing you need to realize about electric net fences is that they have to be kept SERIOUSLY clear of long grass or weeds - anything longer than like 4" will ground them out!! This means that either you have to apply Roundup or otherr herbicide along the fenceline, or move the fence every week-to-month (depends on climate) to mow and then move it back (which is not horribly difficult but is still a chore). You cannot weed-whack along/under the fence, if you were wondering
Also in windy areas you will need some T-posts to bolster the built-in posts, at corners and maybe along long straight sides as well.
It is good for what it is good for, but it is not good for *everything*
Pat