But... you made so many mistakes:(1) No Personal Guarantee: try getting a loan of credit card for an LLC.

I would expect the one in his personal name shows on his credit report as a mortgage and the lender will factor it in his DTI.

Many attorneys charge a consultation fee that will be credited to my bill if I continue to work with them but I don’t want to pay for various consultation fees unless I know for sure that I have contacted the correct attorney.

Bank statement loans likely will not help you until you have been doing your new venture for 12 months and have some deposit history. 

Moreover, you can credit what you paid to Mexico against your US taxes so, depending on your US tax rate, what you pay to Mexico might end up making no difference to you because you'd have to pay to the US what Mexico doesn't charge you.

Her husband was a known drinker with a history of conflict, and it was clear that a straightforward eviction wouldn’t be easy.

Separate bank account, credit cards, signature blocks for every contract and document you are signing for LLC. 

Another period of QE will drop rates to the 3% range for a period.Ultimately, history has shown real estate values to double every 15 years. 

My bookkeeper (who is a new addition to my team this year) has just integrated the first of my business credit cards into Quickbooks.

I use PropertyShark to find the lot size, previous/ current owners, square footage, sale history, ect...