Answers: Either buy or product a table/stand big enough to hold the cage - or look for one on freecycle or craigslist - or do what I did - I bought 2 sets of cubes initially. I made the cage, and hold a 2 level storage base under the enclose. I have it covered with fabric so not a soul can see all the pet supplies under it. You can do the same entry and make it only one level - but you'll want to reinforce it contained by the middle with grids so the cage doesn't collapse.
Either you could spend money on buying a table or something like that to put your coop on, or you could build a stand using left over grids or a new box of grids. Just build the stand 2x4 grids, puting the grids one on the outside, I don`t know leaving a space or two for storage. Then you can build the grids for you're regular cage ontop of that stand and put the coroplast or whatever you used on the bottom of the coop in the cage on top you made. I have these cage for my pigs and they love them!! Good luck!