Dear Nina

Good luck in your quest. My suggestions are to:

1. Try to find out more about the Gympie land – where it is located, what it is worth.  Approach your brothers and sisters for help in having the estate finalised so that the land can be sold and a distribution made to you. This could be a valuable deposit for you towards property – either an investment or your own PPOR. Approach the solicitor to try to resolve this harmoniously as quickly as possible.  If he doesn't have the time to resolve this now for you, perhaps you could ask him to recommend another practicing solicitor. Your father left the land for his children and would have wanted each of you to be successful.  Your other brothers and sisters have their own homes, ask for the help you need and you will receive.
2. Consider further ways to increase your/your husband's wage. Check out some of the job websites to see what similar positions are available.  If your landlord increases your rent, you need to have a fallback plan to cover a rental increase if this happens. 
3. It sounds like you have already considered every avenue to cut down on expenses.  Try the simple savings website http://www.simplesavings.com.au/.  There are lots of freebies and a lot of useful information.
4. Keep reading. All the books previously recommended are a good starting point.
5. Keep looking for every way to save a deposit.

All the best.
Liz