Refi on Owner Financing

[Daniel Fisher]

I purchased a house in October on seller financing.
Since then I have rehabbed and rented out the house. 

Purchase price- $80,000

Rehab cost - $20,000

ARV - $140,000

I am wanting to cash out refinance and pull out some of my rehab costs and get the financing with a real lender. 

Is there a timeframe in which I must wait to refi? Also are there any suggestions on where to refi to? 
I keep hearing everyone say they got a 30 year fixed at a great interest rate, but all the banks I talk to want to put me on a commercial loan with crazy terms. 
This is my fist deal and any advice would be appreciated!

Thank you,

Daniel Fisher