I just made my 10g sump with pvc overflow last week. Im $10 in 1in PVC, $12 in the 10g tank, $10 in acrylic panels precut from lowes. $4 for the micronsock, $60 into the 700gph pump. I am actually getting about 375gph based on my 4 foot height. That's only $96 for the whole build. I made my PVC into a skimmer style overflow. Pulled the power and the water stops, plugged it back in and the Syphon start immediately.
Don't hate on my water cloud. Just added the live sand to it yesterday and a small amount of LV this morning. Mine is a 60g as well.