[prawn]

I'm even lazier than you, so I won't watch it and just guess: I suspect that the purchase is contingent on you committing funds to restoration that honour history (if appropriate) or code. e.g., you can't buy a ruined castle, make it remotely liveable and camp there; you'd need to deal with local council, sewage, plumbing, running electricity, etc. Where a certain technique of centuries-old stonework was used, you'd need to find the lone expert accredited in renovating and securing walls, etc.

There are hundreds of amazing ruins around Australia that the land owners can't justify renovating because the costs to do it justice are too much. Huge shame.