Debt free with 50k to play

[Jaron Tibbe]

I've been a fan of Dave Ramsey for quite some time.  I've lived my life pretty much debt free even before I heard about him, and was looking for some input on getting started.  Here's where I'm at:  sold my primary residence and profited 100k.  I just bought a fixer upper that I intend to live in (I'm a carpenter by trade) and that will leave me with 50k to start my rental company.  My credit score isn't great (lack of history mostly), and it's at 618.  Does this even qualify me for a loan?  Or should I stick to straight cash purchases.  Thanks for the help.