Financing for 2-family investment property

[Victoria Monahan]

Hi all, 

I recently put in an offer on a 2-family investment house and it was accepted!  I currently live in one half of a 2-family house and rent the other half.  For my current home, we used conventional financing with my local credit union and got really great rates with minimal fees.  I am reaching out because this is the first time we will be using a broker.  I have been shopping around and wanted to see if I could get some advise re: fees.  Are there specific fees that are negotiable?  I know the interest rate is set but I am trying to see how to make the best decision/save the most money upfront.  We live in NY (Long Island).  Thanks in advance for all your advice!