critique my business idea: alcohol

i have about 1% of confidence like ace in the hole in his idea, so im expecting this to not get off the ground

anyway, i like a particular type of alcohol, due to shortages of the vintages here, its sold out everywhere, even the reps have no hope of getting it

i can scour the local shops and collectors overseas online and buy it fairly easily but not in large amounts. think 1-5 bottles. its also quite scarce overseas

the shops in oz get them in one or two bottles at a time, charge a premium and sell out before it hits the shelves

i have bought a few and had them brought in through friends travelling bacl to aus, and sold quickly

margins are high at about 40%

im expecting to be able to do this a few more times and thats it. can i make a business out of it

i see the cons as

exchange rate
stock (once overses stock is gone, its gone)
if i bring in larger amounts , ill be up for gst
obviously the liquor laws here
low product variety offerings

any business minded people mind inputting
many great success stories start in the home garage!

critique my business idea: alcohol