Great if you've got a strong back and a good 6 weeks to dedicate to this. Imagine a bed with any size to it and then doing this. Work fine but about the most labor-intensive project you could do. Hire it out at exhorbitant cost, too.
It might be a good idea to set up your system and use the wastewater near plants. You are literally washing dirt? I have a similar setup. but I do it near plants. I live in Vegas so we try to conserve water.
How's she goin'? It sure doesn't take long for washed gravel to fill up with dirt and dust. This is a good way to clean it. I like the table set up with the hinge. Thanks for sharing. Take care!!