Good stuff! How many gallons is your tank?I don't really know how to answer the poll, so I'm just gonna answer here.
At the moment I'm running my setup without waterchanges. I have a refugium to take up nutrients, and I dose All For Reef to replenish minerals and trace elements.
As for cleaning/maintenance I scrape the glass maybe once a week and change out filter floss every couple days. Every two weeks I clean the skimmer and every month or so I stir up the sand and blow the rocks with a turkey baster. Takes me around 5/10 minutes a week to keep everything clean.