If you're looking to cut down on some expenses, there are a few things you can do. For one, try using recycled materials as much as possible – this will help reduce costs while also being environmentally friendly. Additionally, you may want to look into volunteering with or supporting local boatbuilding cooperatives in your area; not only will this give you access to high-quality resources and advice, but it will also help foster a sense of community and collaboration. Lastly, don't be afraid to get creative! There are plenty of ways to build a dock without spending a lot of money. One option is to use pallets – they're easy to find and relatively cheap. You could also try using tires or other recycled materials.

You could cut down on some expenses by building the dock on land and then floating it out onto the water. You would need to make sure that you have a sturdy base for the dock, and that it is weighted down properly so it doesn't float away. Another option would be to use prefabricated dock sections that are made for water applications. These sections are typically expensive, but they would save you a lot of time and labor in terms of construction. Make sure to check with your local authorities before starting any construction, as there may be specific regulations governing docks in your area.