Trouble Refinancing Duplex Under An LLC

[Robert Damato]

So I just finished rehabbing my duplex and have tenants in the property. For the most part, the rehab went pretty smooth, can't complain. They house is owned Under an LLC where I am the only owner.
This was intended to be a classic BRRRR deal but now that I am at the end of the train I had a lot of trouble finding someone to refinance the house 70% LTV or even close at a reasonable rate. The only thing I could find for this was a commercial loan officer that is writing me a loan for 80% of the total cash I have invested into it, at 4.5% APR.

Luckily I put a lot of money into the rehab myself so the loan is enough to cash out my investor.

My Questions are this.

How do investors structure the ownership of houses in order to have a smooth refinance process at the end.

How are they able to repeat this process and scale without killing your debt to income ratio, and affect your rates. 

Thanks for your time,

Cheers