I love this idea! It's made out of 2 x 4s. Not only is it way more affordable than buying but it can be sized to fit your space. I saw something similar in the Pottery Barn catalogue for thousands of dollars.
Get rid of tree stumps by drilling holes in the stump and filling them with 100% Epsom salt. Follow with water, and wait. Live stumps may take as long as a month to decay, and start to decompose all by themselves.