@Judi1002 You are misinformed. You have to pay income tax and occupancy tax to the Mexican tax dept. for any listing in Mexico.
The tax treaty doesn't mean you don't report earnings and pay tax in both countries, it means you can't be double taxed. So any taxes you pay in Mexico will be deducted from the taxes you owe in the US.
And you may be able to claim even more deductions in the US, as the only expenses you can deduct in Mexico are the ones you have official facturas for issued to your RFC number, whereas in the US, you may be able to deduct all expenses you have any type of receipt for.