i would say this sort of project is something that can be accomplished in a few days
basic understanding of pool plumbing and carpentry is necessary..
concept came after a long rain filled our warehouse loading with black dirty mosquito water.. realizing that it held water we thought what if we filtered it? turns out what you get is the coolest project ive ever attempted..
Step 1: Clean Clean Clean Then Surface
near the sidewalk we built a 1 cinder block tall wall filled with cement then covered with a ton resin.... and it leaked ... we ended up filling the entire area behind it with cement ... id suggest having a cement retaining wall pored at the front of the deck line..cleaning under the deck is not cool.. adding some sort of pump back there would be good, as water will collect there..
Step 2: Build a Deck.. Add Plumbing
add a pool heater an underwater 500 watt pool light and let the hose run