No way
by the time you buy,proper skimmer,proper lights circulation, additives test kits then you have livestock
rock 12-20 a kilo for 60 litre around 6-8 kilo
fish normally around 100 each, clowns are 90 in wellington,bangaii 90,flame 180
then corals, now 4 corals wouldnt even fill a gap in a marine tank no matter what size. and each coral here in wellington is around 90-120 for a normal size coral, 60 litre tank maybe 8 corals might make it look alright
then you have a bag of sand 50 dollars
freshwater is WAY cheaper and way easier, no doubt about it, they are nothing alike