Electric fence wire

Hello all. I have been planning to put in an electric fence for my goats. I have set up a space 60' x 100' for their enclosure. I have 4 inch posts at all 4 corners and an additional post at 50' on the long sides and 30' on the short sides.  Here's the real question now. If I run 12.5g wire from the first post all the way around the other posts to the last post and use a tensioner will that work? Or I need to run a single line for each side with a tensioner.?

So wire from post 1 all the way around to 9 with a tensioner? Or post 1 to 2 with a tensioner then 2 to 4 with a tensioner and so on? Please let me know thank you. In-between post 9 and 1 is their barn so no wire will be there
6.            7.               8

                                9.

5.                             Barn                    
                                 1.

4.               3.             2

It will work sort of, but hard to get enough tension and a pain in the butt to fix when it breaks. If you have to because you can't get or afford more now, fine but expect to replace or upgrade it sooner rather than later.

Ty. Not trying to sound like an @$$  but at this point I've been saving to do this right so money is not an issue for this project. I am a fan of over egnineering. I don't have the time to do it 2ce so I need to do it right. I am just not sure which is the "better" or ,"correct " way.  I originally bought enough posts to go 8ft a part. Then  I read it's better to go 30-50ft a part with electric wire. So I drilled in 9 post for the moment. I have 4000ft of 12.5g wire, like 300 post line insulators and 30 tensioners.  No springs or setup for gates but I'll figure that as I go. If I need more tensioners I'll order. If repairing would be a pain on a single line I won't have the time to fix it. And these stubborn goats will deffinelty take advantage.

IMO, from a maintenance perspective, it's far better to have strongly reinforced corner posts (braces or wire outriggers) and tension your wire from that point.

You already have your wire, so that's probably your move. For those who go with the plastic/wire electric fence wire, it has enough "spring" for a wraparound installation. My 2c.

This is what we use for our "gate" it attaches to the fence wire.

Amazon Link

+1 on over engineering the brace posts.  Double H with pins

Thanks for all the replies. I have been setting posts. 8ft post put 3ft in the ground with concrete. Tar on the bottom 4ft make it last a bit longer. If the goats escape this or destroy it after it's built I think I will just have to eat them... Lol.