My two cents...I think PDQ hit the nail on the head...the hardest part
is the fence posts.
A fence was one of my first DIY projects and turned out to be fairly
easy. I dug the holes and was extra careful about the placement of the
posts. I started in a corner to set the first post. I set it in
concrete so that held it pretty well and used a post level (about 5
bucks at a hardware store) to tell when the post was plumb in both
directions. I ran mason line the length of the run to make sure the
posts were not twisted and were even with each other. I used a tape
measure to set the posts the same distance apart (about 8 feet)
measured center to center. All in all it took a day to dig the holes,
and a day to set the posts. I had one post that was about 6 inches
higher than the rest of them..no problem...5 minutes with a circular
saw and problem solved. From there i bought the prefabbed fence
sections from Home Depot. If you set your posts right it only takes a
couple of hours to put the fence sections up. I used a line level to
set the height and then hit it with screws. Everything but putting the
panels up is a one person job. The panels are heavy enough that i held
them while someone else screwed them.
Also, when i dug my post holes I did it using a post hole digger. Not
the way to go...you can rent a power auger and knock them out in a few
hours. You can concrete the posts in, but if you are afraid of making
a mistake, you can just set them in gravel.
You can used treated wood, but it will turn grey as it weathers. You
can clean it with a power washer once in a while and that will help.
If you use cedar, the cost goes up but the finished product looks nice.
Good luck. IMHO this is a DIY project, even if you are not that
handy. Take your time and set the posts right and the rest will go
smooth. Or, like PDQ said..hire a pro to set the posts.