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

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.

I recently connected with a gal through a BP meetup and want to try and organize a partnership.

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). 

Gain the skills to take on projects like revitalizing single-family homes, converting underutilized commercial spaces into profitable mixed-use properties, constructing small apartment complexes, or repurposing vacant lots into valuable community assets, all with the aim of strategically growing wealth within the community and for your family.As a Developer, you’ll also become a….Community Catalyst: Become a local real estate developer to transform your community, shaping its future and making a positive impact.Profit Center: Real estate development offers opportunities for financial growth, turning your investments into substantial returns.Creative Agent: Unleash your creativity and innovation in design, sustainability, and community-focused projects.Job Creator: Your projects create jobs, benefiting both the community and local residents.Legacy Builder: Develop a lasting legacy by creating buildings and spaces that leave a profound and enduring impact on your community for generations to come.Join the movement to reshape our community through local real estate development!

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. 

But per lot it will cost roughly the following:$1,500 Electrical poles, meter installation $2,000 water taps and connections$5,000 grading and land prep$8,000 septic installation (assuming a 1:1 ratio of homes to 1000 gallon septics)$5,000 down payment on each home ($700-750 / thereafter per unit)$21,500 total set up x 17 = $365,000Ongoing expenses after development would look something this for POH model: $12,750 a month in mobile home mortgages (17 x 750 for PITI on each unit) $1,900 a month in land mortgage PITI (house) $3,000 a month landscaping$2,000 a month in reserve emergency fund$2,200 management$21,850 a month total expenses $262,200‬/yearOngoing incomes after development would look something this for POH model:$27,000/month ($1500 x 18 {17 mobile homes plus house})$324,000/year324k-262,2k = 61,800 net pre-tax profit or $5,150/month.Opportunities to reduce start up expenses: Bulk deals with the government or contractors for doing all the work at once (electrical, water, land grading, septic) Trade free rent for someone to mow and landscape (turning a $3k event into a $650 event every month).