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. 

You can only change your neighbor's fence with their permission. A neighbor's fence is their property, and altering it without their consent could constitute trespassing or property damage, which may have legal consequences. If you have concerns or disagreements about your neighbor's fence, communicate with them openly and try to reach a mutually agreeable solution. If you believe the fence violates local zoning laws or property regulations, consult with local authorities or seek legal advice to address the issue through proper channels. 

Hedges are a better financial investment for a home than fences in several ways. First, hedges are less expensive to install than fences. Fence installation costs $1,775 to $4,600, depending on the type and size. You can also choose to plant smaller and less expensive hedges, knowing that it will take longer for them to mature. Next, mature hedges add resale value to the home, meaning the cost savings get even better when it's time to sell.

If you only use your gate as a pedestrian, walking through without a vehicle, you’re fine to stick with a single fence gate. If your fence opening needs to accommodate vehicles of any kind, from cars to trucks to 4-wheelers, then a double fence gate will suit the space much better and give you more freedom.