Probly 3k total for a 40b and 20 sump, I’m cheap af when I need to be lol sump / overflow where trades for my yellow tang that I got cheap due to disease (healed/ traded after Hawaii ban) petco gallon sale for tank all of my anemones cost 40$ max or where trades for my coral , only buy frags that cost 30$ or less dry rock from Amazon 30 lbs for 55$. The lights cost the most 4x$180 720$, I do have weekly costs of Water from lfs like 5$. Buy used equipment / corals from local reefers and be sure to pass on the savings is my advice