This is just a quick List of items that are mostly imperative (IMO)
Right then I am going to work on the assumtion that you will be initially going for a Fish only tank and then gradulay onto some soft corals
BioStar Flotor Skimmer 115.00
Powerheads 60.00 (for 3 x 1500)
Lighting 60.00 2 x T5 Power Comapcts & Ballests (1 x 55w & 24w Actinic)
External Filter 40.00 – 80.00
RO Unit (50gpd) 60.00
Heater/s 30.00
Live Rock (12kg) 9.00 – 12.00 per kg
Test Kits – Salifert 50.00
Salt (Instant Ocean 25kg) 49.99
Hydrometer 19.00
Or even better
Refracometer 35.00
This is really just the basic, you will also need this like Phophate & Nitrate removers,Food, Nets, medicines, Marine Keeping Books, RO Containers, Buckets
Also have a look at
This link, I added most places to get some of the above items
Show me the money