The advice I would give as a lender are these few options if you both are on mortgage.

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).

Feel free to reach out, I'm happy to chat and discuss options :) 

The agent turned down a seller financing option - although it was not ran by the seller - because the agent said the seller is so done with the property that she wants nothing to do with it at all.

The “borrower” would have an option to buy back the property if (1) all lease payments (“mortgage payments”) have been made and the borrower/seller pays is the sale price/loan amount in full at the time the option period/note matures.  

Consider house hacking by purchasing a multi-family property with an FHA loan, or explore creative financing options like seller financing or partnering with private lenders.

Financing options do exist: hard money loans, renovation loans, and some traditional mortgages can be used on distressed properties if criteria are met.

My two partners are willing to pay their share, but they’ve also offered me the option to take over the property completely since the loan is in my name.Here’s my dilemma: If I keep the property and rent it out, I could get around $2,300 in rent, but my mortgage is $3,300 at a 7% interest rate.

If you are skilled in each of the areas above, and you have enough in reserves to cover the costs of when things do not go as planned, then you can likely attract money from private money lenders who want to get a return on their money and they see lending to you as a low risk way of earning a better return than in the other passive investing options they have. 

There's zero reason to do this when there are plenty of options to avoid it.