If you are looking to save money we use treated garden timbers for posts here on out farm. They work great and are affordable.Too bad that i cannot give you 10reactions for your post!
And you are right, electric fence it will be, i found out that if you buy polywire in larger length it becomes much more affordable.
The neighbor's dog was nowhere to be seen or heart today, so i assume the "man in the house" took the incident way more serious than the "Missus" did and the dog will soon be subject to a two week quarantine, which gives me some time to add electric fencing to the most vulnerable parts of the property line first.
In the long term it will replace the electric fence with wattle fences like this:
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Those fences don't need to be as tall as in the picture above, because i can always run a charged aluminium wire on top of it… Plus i can harvest almost all the needed material on my own land, except for some Cedar posts. I already have to cut down a lot of young trees (1-3 years old) that have started to grow on my pastures, on the drive-way to my neighbors house, the drive-way to my barn, and pretty much everywhere. It will just be a lot of work to do, but hey i need to loose weight anyways!
And such a wattle fence is much easier to build on steep and uneven grounds!
My idea is to construct massive cedar posts at the edge-points, a vertical post with two load distributing beams? (idunno the correct term for these diagonal struts), have another cedar post every 12meters (40') and use the stems of the 3 year old trees in between. It will take me a couple of years to build this, but that will also increase the value of my property and give us even more privacy here.