Hos much money should I have set aside for the big move?

I'm planning on moving to Brisbane with My wife and 2 children (4 and 6) from Vancouver in the summer of 2010. I'm going to try to get a 175 Visa but am unsure if I meet the requirements for my profession. My wife will be going to school at the University of Queensland. Our plan is to stay there for a year or two.
We're working on adding up the cost and I thought I'd ask you guys for advice to see if this dream can be a reality. Does anybody have a link to the breakdown of expenses or could you help me add up all of the expenses before we go and apply for our visas?
I apologize if this topic has been covered. Thanks for your help

Here were our visas costs (in Canadian), this is for the 175 visa which we did ourselves (no agents fees for help). This was a couple of years ago so costs may have changed and I might not have the total dead on.

$350 - skills assessment (Engineers Australia)
$2000 - visa application fee (this may have changed since 2006)
$250 - certifying documents
$700 - medicals (for 2 adults and two children, done in Edmonton)
$60 - 2 police checks at $30 a piece
$60 - long form birth certificate for all of us (can't quite remember costs)
$100 - postage & courier fees

$3520 all together to get the visa.

Then there's the settling in costs. If you're only going for a couple of years then there's probably not much point in shipping your belongings, unless you can do it cheaply. It would probably cost about $10,000-$15,000 to ship a 20 foot container. Or you could just send over some boxes which would be cheaper.

Set up costs when you arrive:

Car - cost varies but I would say about $10,000 if you get a used car.
House & furnishings - could be about $15,000 if you buy new stuff of average quality. Or you could get cheap stuff, or free stuff off freecycle if you intend to try and save as much as you can.

Rent - you'll probably need a few months worth of rent, depending on where you are and what you're renting it could be $250 to $450 per week.

School fees - if your wife is going to school her you'll need money for that so that it's paid upfront. If you come on a permanent visa she's pay regular fees, if you didn't have that and came on a student visa then she'd have to pay international fees (big $$$$).

That's all I can think of at the moment.

For what it's worth I would definitely come on the permanent 175 visa if you can. The cost is worth it because you would really save money (a few grand a year) by not paying expensive private health care fees. If you come on a permanent visa you get the free (or almost free) Medicare. The only exception is if your family income is too high (over $140,000 per family I think) then you would need to take out private health care. But as permanent residents private health care would be cheaper than if you didn't have that.

Good luck.

Awesome, Thanks for the reply!
There are a lot of little costs associated with the Visa that I didn't think of.