I have a few banks and family offices I've worked with for years that will definately do the deals with me. 

He is looking at a group of investors like myself to bring 25% of the project value and then procure a bank loan for the remaining 75%.

They'll expect electronic payment options--easy open a landlord account at your bank and give routing number and account number to tenant (ACH payment). 

And they'll want you to pay off the loan pretty soon (and usually will you as the rate will probably be higher than banks) so there's that too.For this reason, we definitely prefer private lenders as they will (if you've built trust with them) often lend on the rehab too.

Quote from @Griffin Malcolm: Open an LLC and apply for a small business line of credit from Key Bank.

The liquidity or funds for the purchase can be in your new entity or your personal bank acct.

Not sexy as Lexington but bank account is the ultimate measure of success

That's how the banks do it.

Generally speaking, with SFR or small multis, I just rely on the lease/rent roll (and some form of proof of payment; i.e. bank statements, deposit receipts, tax returns, etc.). 

Keep in mind banks still pool forclosed assets together and sell them all together as a group to one company.