The Firm targets home buyers who do not have good credit but generally speaking they have cash savings and good jobs or businesses. 

Even if the tenant says they don't have any previous landlords, always verify that with the addresses on their credit report and ask them about any addresses that show up that they didn't voluntarily provide on the application. 

Run her mom's credit as well, get proof of her income, and have her co-sign?

To exacerbate the problem with that equation further - you get credit for rent that will offset some of that debt. 

I would also like additional capital to -Fix up that home (instead of me paying for the repairs/upgrades over time)Invest in stocks, (As I've been learning/studying for over a year now, making small amounts here and there as a trader) Potential upgrades for my business (me and my family run a successful auto body and paint shop)Because of my good credit (almost 800) I feel like some type of bank/company/individual must be out there willing to work with me!

A good source I have heard are credit unions as they are not governed like banks.

As you start developing a credit history with the LLC, shouldn’t you be able to exceed the loan limit?

I credit Bigger Pockets big time for helping me get it together.Jeremy and Brendan are right on the money. 

"Sell me your house for what you owe and avoid losing your credit".

However, it doesn't allow me to easily point a tenant to a link, fill in some basic info (credit, move in date, etc.) information and request a showing time.