Hi there, the cost on trades sound about right, but if you would like to save money on the shower screens, bath, vanity, taps and tiles etc.  try the auctions

I know the ones in NSW are great you will save thousands.

laws auctions (wetherill park)  have everything to build a complete house!  and you can get brand new things for under cost price.

also graysonline.com.au have excellent fittings all the time on sale, but remember, dont bid until the end because your pushing the price up on yourself!

Hope this helps