With the recent tax law changes in capitol gains taxes in Canada and this property not being their primary residence.

My goal is to help property owners navigate management challenges while ensuring their investments are well taken care of.I’d love to hear from experienced investors about what’s working in the Charleston market and share insights as I gain more hands-on experience.

What the concept you mentioned is talking about is leveraging equity to gain cash vs. selling essentially. 

Here’s how using a Self-Directed IRA (SDIRA) to invest in real estate enhances these benefits, especially for those looking to diversify their retirement portfolio: Tax-Advantaged Growth: Real estate investments inside a self-directed account grow tax-deferred (traditional SDIRA) or tax-free (Roth SDIRA), meaning rental income, appreciation, and even gains from selling the property stay shielded from taxes until withdrawal—or forever in the case of a Roth!

Let her sell it as she won’t have a taxable gain which you will have if she gives it to you and you sell.

Selling at FMV avoids the gift tax but provides your child with a higher tax basis, reducing their future capital gains liability.A better strategy for selling below FMV is to sell the house at FMV on an installment note, then forgive interest and principal annually up to the gift tax exclusion amount.

I own a duplex in Tempe Arizona and looking to continue to gain experience.

At this point since it's after the fact while not totally correct; you may explore adding the missed asset/basis amount as a selling cost to just reduce your gain. 

Slow start but hoping to gain momentum.

I would sell and take your gains.