I found this picture of a couple who live in a floating home. This is their garden. I hope I am not offending anyone by posting this picture. I will try to find the blog and post it later. I think it is pretty amazing to think that even if you live on a river you can have a garden.
Here is a day bed made from 4 pallets and a mattress. Pallets are free or can cost about $2/each. Imagine this with a nice coverlet.
My son gave me these boxes to use as grow boxes. It took a bit to unload them from the pickup and walk them into the growing area. A factory next to my sons company puts these out for people to pick up for free.