Hi were semi new to sailing and as blunt as this will sound, will 50,000 aud be enough to buy a rig to travel on? Will it be able to get to hawaii on that price?

You bet. Spend half the money on the best boat you can find that has recently competed a similar ocean crossing, spend as little as you can refitting essentials, and the keep the rest for adventures.
In 2009 we set out on a 31' boat across the pacific and had an amazing time for two years loving on about $1000/mth.
There are some bargain boats out there - find a seaworthy small one, and then learn to sail!

If you are unable to find the rig you need to do what you want in Australia for less than $50k, I think you are not looking hard enough.

From what I have been seeing, Australia has to be the best good cheap yacht market in the world.

If there are just 2 or 3 of you, and you know what you are about, this one would do it in fine style and leave you with change from $50k.

https://www.boatsales.com.au/boats/details/2001-ADAMS-10/SSE-AD-5510882/?cr=0&psq=%28%28%28Service%3D%5BBoatsales%5D%26Segment%3D%5BSail%5D%29%26%28SiloType%3D%5BDealer%20used%20boats%5D%7CSiloType%3D%5BPrivate%20used%20boats%5D%29%29%26Make%3D%5BADAMS%5D%29&pso=0&pss=Premium

Have a look at the yachts on this page too. An Adams 31 will do the job too with a bit more comfort.

yachthub.com/list/search.html?action=adv_search&se_region=au&statE=all&new=New+and+Used+Boats&cate=All&makeid=2101&Make_Model=Adams&hull_material=all&keywords=&price_from=1&price_to=1000000000&Lengthfrom=7&Lengthto=11&feetfrom=26&feetto=35&yearfrom=&yearto=&order_by=price_asc¤cy=&poa=yes

While that amount will get you a good sailing boat, please get some sea miles under your belt before venturing that far a field. Not saying you take years but learn to sail by the stars, take her out in bad weather and heavy winds. Get some bar and channel crossing in and how to read a nautical chart. GPS is great but plan for the worst. Which for GPS is complete electrical failure.

It's a long way to those islands and once you are there it will take you just as long to get you to Hawaii as it did the islands.

Don't spend your whole budget on the purchase price and leave some for outfitting and chart purchases. I believe some places where you travel outside of Australia, you need up to date paper charts. I could be wrong though but I'm pretty sure it's required in the US of A

I also would like to agree with Cisco but the I think the US has some of the cheapest good boats. Not that Aussie boats are any worse. Theres just a lot more coastal cruisers and non blue water boats that muddy up the market in America. And they also got a lot of the questionable taiwan boat that need expensive deck fit outs to replace the teak decks