Utilized a low down payment loan, maxed seller credit, tax proration and closed on the 1st of the month to maximize my cash and acquire this property What was the outcome?

That's pretty low for a 3-BR - I'm seeing the FMR for a 3BR in that zip code is $1,850.But at $1,300 for rent, you'll probably find HMLs that may lend you around $120k if you have a good credit score in my opinion, which means you'll need $45k + closing costs.

Quote from @Raymond Kalonji: In your opinion, what would be a reasonable minimum credit score?

How important is it to have good credit when making these deals? 

The credit unions in my area only work with bigger companies so just know I have already reached out. 

I contacted the bank and they told me the person needs to go through the regular qualifying process such as income, credit core, employment history, etc.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

RentRedi’s syndication marketing helped us secure a great tenant in under four days, including employment and landlord verification, as well as criminal, credit, banking, and eviction history checks.

Here's a good folder setup.Bank StatementsCredit Card StatementsProperty Management StatementsMortgage StatementsSTR Platform StatementsInvoicesReceiptsClosing Documents (Purchase/Refi/Sale)LeasesCheck & Deposit ImagesVendor ContractsW-9’s & 1099’s

If you're focusing on rural properties, sometimes local community banks or credit unions are open to these types of deals.