Here is one of the stands I have been using the last couple years. All you need is a couple of 2 x 10 or 12's and four concrete post holders(4x4). Once all together it is very solid and can be moved fairly easily. If you have bottom entrances it gets it up high enough that skunks should not be a problem!
+1 for stacking cinder blocks and running 4x4s between them.