We are wanting to extend our swim season to get the most out of our pool. Even a month on either end of the season would be nice. We like the water in the high 80's low 90's range. I would want to do this on the cheap and DIY. I would get the panels from Craigslist and install them myself on a vertical pilaster block wall. My biggest concern would be the wall supporting the weight of the panels and plumbing. Do you guys think the wall would support 4 or 5 panels? I would mount it as low as possible to keep the weight off the top. Here are some pics of the wall in question. These pics were taken in the middle of may and the wall is just then starting to get a bit of shade. Please let me know what you all think.