Should I keep my MFR loans separate or combine them??

[Joshua Reffett]

I currently own a four-plex and a duplex.  I purchased the duplex earlier this year via a cash out re-fi from the four-plex and walked away with 19k at the closing.  I'm currently looking at another duplex and I am curious what the community has to say with regards to repeating the same process to purchase my 3rd property. I may not have enough equity left to cover all the down payment which is fine but I am trying to decide if I should use a different lender and keep the new duplex as a separate loan or just roll it into my existing loan.  Is there benefit to having all my properties under one loan or is it best to keep them separate?? TIA!!