Beg Explain patiently to professional carpenter husband over several months that current compost bins are old and too small and in the wrong place. Paint dazzling word pictures of abundant food and rich soil that would result from beautiful new compost bins.
Step 2: Research. Turns out it's not easy to find a good set of plans! Most of the compost bin instructions out there are for recycled pallet bins or a couple of other common designs that were dismissed by said husband as either too ugly, too expensive to build on our budget, or lacking in lateral or other significant supports.