yip, you can do it cheap as... probably for $500-600 (as my local fishstore told me.. :lol: :lol: :lol: :lol: )
Unless you wish to have anything interesting (anemones, shrimp, corals etc... etc...)
Then the cost is as much as you wish to spend...
Budget at least 2000-3000 and take your time shopping and READING up. Also look on trademe will save you heaps, and make your money go further.
Good luck..
JDM has a good tank on trademe for cheap, don't know how you would get it to Nelson :lol: :lol: