They also have accountant access to my bank accounts and credit cards, so everything gets reconciled.

I have great credit, killer salary, and a bunch saved up but still can't afford a 20% down payment on anything over 600k. 

Closed-end private equity style offerings generally have very different liquidity profile than a private credit fund (or interval funds), where the investor lock-up period is generally longer, with most of the returns being generated at exit (or back-ended).

If you have decent credit (north of 680), you should be able to get 75% loan to value, assuming the DSCR is met (usually a 1 to 1 measurement between the PITI and the Gross Monthly Rental Amount).

What is the credit requirements they look at?

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.