IME this hobby is expensive if one does not take the time to search around and compare prices (especially if you're new to the hobby) of tank set ups, live rock, sand, equipment, etc... I suggest not rushing this process and buying everything from the first LFS you visit even if they seem nice and trying to give you their best price. When it does get expensive is when you become a more experienced reefer and start getting into overpriced named corals and quality equipment and chemicals. But yet again you could search for deals and better offers.