While power washing isn't a requirement before you stain a fence, it can make the job much easier and faster while reducing manual labor requirements. The stain will not work if the wood is full of dirt and dust, so power washing, sometimes called pressure washing, is a fast and effective way to prepare the wood for staining. Remember that you need to stain or repaint relatively soon after the wood has dried so that there isn’t time for dust and dirt to build up again. 

The depth of your post hole depends on your post length. If you decide on a two-rail fence, the posts are likely 6 feet long. You want your hole to be at least 1/3 of the post length. In this case, your post hole should be two feet deep.

If you opt for a three-rail fence, the posts will typically be 7 feet long, meaning your post hole should be 28 inches deep.

The bottom strand should sit between 12 to 15 inches from the ground. If you have a problem with small critters, you can aim for 8 inches. Three-strand fences should be 16 to 19 inches apart, four-strand fences should be 10 to 12 inches apart, and five-strand fences should be 8 and 10 inches apart.

In the vast majority of cases, chain-link fences are less expensive than wood fences. Installing a wood fence costs anywhere from 20% to 30% more than a chain-link fence, or an average of $3,100, whereas a similarly sized chain-link fence will average around $2,400. Even with add-ons and additional protective finishes, a chain-link fence is very likely to cost you less than a wood fence. The only exception would be a split rail wood fence, which can cost about half the price of a chain-link fence or less.