Nice plan-
I plan on using cypress- Much stronger than redwood or cedar. The cypress will last as long as the other choices.
I plan on adding casters for mobility- In the garage for the winter.
Thanks-
John

Compost bin plans can be found in several places. All of these resources will be found in most Libraries.
The first that comes to mind is the text to the famous PBS series "Crockett's Victory Garden." Excellent resource. Another is the Readers Digest publication "Practical Guide to Home Landscaping." You can't go wrong with either one. They are probably considered the bibles of growing stuff.
John