Another thing to consider is the ground itself. I built some nice stands with 2 x 4 legs. Put about 8 hives on it and didn't realize the ground was a little soft in this area after a bunch of rain. Needless to say I have to move the hives to a different type stand and slightly different area.
Stands I use now are 4 x 4's through cinder blocks. This is a good set up and an easy, quick set up. You don't want your hives too high from the ground either or you'll be working them from a ladder.