I'll echo what Remmy said above, for all of her reasons. Clarifying that you don't live in a common property state, having all material titled possessions in your name and your daughter's (hers? That alone looks very suspect), planning to de-AU yourself from her reports and financially separate yourself fully before this goes down - all of this looks like planning to default/defraud her lenders. It has the same optics of people with insider information dumping stock in advance of a known upcoming sell off and devaluation.
If she walks away from all of this, she is definitely going to be besieged with collections and depending on the lenders, lawsuits. Her credit will obviously be annihilated, and as stated, you will then have to carry all credit burden going forward. Likely you'll also carry the majority of financial burdens in general too, as her income may be garnished/attached to repay the defaults, or to pay judgments and collections. Titled assets are traceable for ownership, and I imagine that if your wife is walking away from considerable dollar amounts of debt (which is likely - very few would walk away from $1500 of debt), and she is sued, they may find it funny that in a marriage, only one partner is the titular owner of every registered possession. Checking ownership and seeing that valuable assets were transferred to others before the debt was abandoned may create other issues. This is supposition on my part, the permissibility of tracing ownership, but my gut feel is that it's legal to investigate.
Im just going to throw this out here - you don't have to answer it, but please consider it. Is your daughter aware that she is the owner of whatever titled goods are in her name? If so, I hope she is fully aware of the responsibilities that accompany that. If not, I would urge you to reconsider doing so.
Bankruptcy holds a certain stigma that really isn't applicable anymore. It would be a far better way to go for her, and would absolve her of these debts if she passes the Chapter 7 means test. They would not haunt her as they would if she just walks away from them, and the rebuild would likely be easier than trying to recover from abandonment. She can file for it without you also needing to, so you could remain unaffected by her filing and keep your credit intact.
I would strongly reconsider what looks like a plan in motion. I don't see any way it ends well.
