As a concrete contractor we would use a tow behind redi-mix trailer for such a small job, such as Cart-A-Way. Mixing by hand is not a good way to go for quality, and back breaking. just trying to finish the concrete so it lasts a couple of years as a rooky will be a challenge.
A truck will cost more with short load and possible time. The tow behinds hold up to 1.5yds and are flexible on time. You will need a place to wash out though. Also, get a full blown mixer type, not the crappy old Ez-Carts.