Also, will she have to claim any the profit (if any is made) on her FL Income taxes?

If the rental market is extremely profitable, you dont need more incentives to buy rentals, you were going to do it regardless. 

There are no laws, rules or regulations preventing any foreigner, American or otherwise, to buy property in CDMX or Mexico for that matter.If, by having success, you mean getting a profitable investment, I'm sure many American and other investors got that over the last few years (I personally haven't since I've focused my efforts on Mexico's beach markets, which are far better in my opinion.

We leveraged our expertise to secure the property at a competitive price, ensuring there was enough margin to make necessary renovations and achieve a profitable sale.

As we reach deeper into the real estate recovery cycle, profitable deals are getting harder to find.

I always recommend Profit First (know how to structure your income), Never Split The Difference (good for negotiation tips) & Exactly What To Say (more sales, negotiation tips). 

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There area  few great deals that require around 500k cash, and even if we split profits and equity with someone then the work doesn't seem to justify the profit.

But overall, it's been profitable. 

But before we go on the quest for all the fancy amenities, I think a lot of STR owners should focus on the basics first.Just my .02I agree, but assuming you already have the solid basics like a nice, clean place and you want to figure out how to choose the best amenities to make your place stand out and increase profitability, the tool I’m trying to find is what I’m asking about.