If you do not mind, few useful tips.
I have spent $35K to buy a 180 hectares block in Riverina - hour's drive from Adelaide. This makes life much easier - run out of storage - just buy another shipping container and fill it.
Crucial - keep the inventory of the stuff (in Excel spreadsheet for example) - what, in which container and at which shelf.
Saves heaps of money. Every builder throws in the skip thousands of dollars worth of surplus stuff which costs fortune to buy when you need it.
Another tip. You do not even need to reach into your hip pocket to buy land for that purpose. With little creativity you can use your super money to work for you before you retire.