Hi Matt,
Depending on the set up your looking for.. SW=$$$
You can save $ by getting second hand tanks and use 1 for the sump.
I am in the process of setting up our new marine tank, so far this is what we have.
Main tank 1200mm x 450mm x 600mm high 10mm glass $500
Sump 1000 x 450 x 450mm 6mm glass $150
Timber for the stand $120
Micro Aqua Protein Skimmer rated for 1200lt per hr $380
Equipment still required
T5
HO lighting $450
Return pump $200
Sand & rocks $100 ( using dead rock and cycling using
ammonia method )
Plumbing $50
Power head $50
Algaes $50
Seahorses 8 x $65= $520
So the total will be around $2320.00