The keter outdoor storage boxes are really handy things. The do however only come with 2 wheels, for 1 side of the box, so if you want to move it on the wheels, you would need to do so using a designated side. However, print 2 of these replacements and you can drag from either side (just don't put it on a slope). 

No supports needed, print for strength from PETG or ABS. Orientate a wheel on its end and help it out with a brim.