Where can an LLC get a loan/mortgage?

[Robert Pole]

I have an LLC which owns 3 two family houses fully rented. There are no mortgages on these houses. I'm looking to pull 60-70% of the equity to purchase more properties to rent out and boost my income. I'm not in a position to get a personal loan right now but not because of bad credit. I've been getting shot down with all different excuses which don't make sense to me. Where's a good place to look?