I bought two inexpensive compost bins a few years ago ($28 and $34) and they are doing a great job.
I fill with grass clippings, leaves, garden scraps/weeds and veggie scraps from the kitchen compost pail. I also add shredded plain paper from junk mail and newspaper. Adds nice carbon and air.
I have a shovel and a compost turner with flip-down wings that does a great job turning the piles and cranking up the break down.
I have also experimented with some compost activators and have found the best and least expensive to be organic veggie based rabbit feed. A few days after and a few dampened pounds of feed the bin is well over 100 degrees and turning black and nutritious.. I have one bin almost completely full and the others is just under halfway.. Should be perfect for fall cover up and then spring Kickoff.
I also have worm bins to let those little buggers crank out some fuel for plants.