Upvote:4
It was a mistake to not include the evidence of land ownership. A typo isn't likely to matter much or at all, but it does show evidence of intention to leave Australia. This should be included.
A child in college is not necessarily a sufficient family tie to show intention to leave, but a minor child would be. Since that child would have been traveling to Australia with her, there's no intention to leave demonstrated.
There's no required waiting period before reapplying, unless the refusal letter specifically mentions one. The important part of reapplying is that the new application must show significant changes in personal circumstances, or it will likely be refused again.