And unlike the borrowers, who fund the whole damn thing, the investors are covered for losses.

Two main reasons being: (1) debt does not increase your basis in an S Corp, which means your losses get limited.

I had clients in PHX  and Vegas that lost their 4 plex's because they went 100% vacant and stayed that way.. they owned 4 or 5 of them.. it only took about 3 months of negative cash flow and they were done.Max leverage loss tenants  lose property.. that's the formula..  

Lending and insurance are based on predictability and without question the frequency and size of losses will continue to eclipse prior records.

There are ways you could do this, but it sounds like you've already resigned yourself to the loss so I won't bother.

Thanks to this equity growth, we were able to recover much of our initial cashflow loss.

They refuse to give investors the information they ask for such as who is the loan through, what kind of state it is in, and who are the GPs, LPs, profit and loss statements.

I am left feeling that working with them was a wasted investment and decided to cut my losses and move on.

Or buy a thermal camera to check for heat losses, they have gotten really cheap. 

.- Additionally, you can track income and expenses consistently using software or spreadsheets.If you track everything, you could show a loss and use that to offset other earned income (such as a W2) which will net you a bigger refund.