[RStar]

I have helped put a rigid one up, and I suggest about 8 people helping hold it while putting it together. And you need a thick foam pad for underneath or you'll end up with some sharp object under it no matter what you do. They sell them for putting under the liner for ponds as well. Also, a bucket of water by the pool helps to keep the grass out of the pool.

I had a blow up type, and I had to put air in it about once or twice a week, but other wise I had no problem for the whole summer I used it.

Plan about a week for the water in the large pools to warm up enough to use. And plan to keep it well covered to stay clean. Put it in the full sun, and away from trees.