I’m wanting a bicycle trailer to carry cargo similar to your custom trailer picture. Any ideas??
I have some lighter-duty trailers in progress that may work for you. How much weight do you need to carry? Do you need a covered trailer?
If you only need to carry a few bags of groceries or similar, Burley makes some really nice lightweight, collapsible trailers that might be more cost-effective.
Here is some more detailed info about my trailers: