Bear in mind that the fiscal treatment of the two options in Mexico is different (withholding tax on the gross income with the fideicomiso vs cost deductions with the corporation).

Whether you're looking for a solid investment property or a home with income potential, this duplex is a fantastic opportunity.

Investing this amount in passive deals might not provide immediate income, and you could end up waiting years to see returns (similar case in most investments.) 

However, before you do so you should ensure that your revenue from rental income covers ALL your property expenses in the townhome, including mortgage, taxes, insurance, maintenance/repairs, vacancy, property management, etc...

Income from leveraged real estate or active business income.

I’d dig into this a bit more.Another assumption that stood out to me as potentially problematic is the 6% income growth and only 3% expense growth.

I'm confused why would you say that rental income is taxed in an IRA?

Make sure you’re consistent with what you’re looking for in income, credit, and references to avoid any potential discrimination issues.

Spend what’s needed to upgrade with reliable mechanical systems, roof that doesn’t leak, remediate all mold; interior design modernized; in other words a place that will attract a higher income no hassle tenant.  

I'd be heavily focused on mitigating that future tax liabilty rather than directly supplementing that income.