Quote from @Nicole Heasley Beitenman:
Hopefully you can find a lender with lower rates/fees as the others have suggested (although I would be wary of the cheapest lender. I've used the cheapest lender in the past, and they were cheap for a reason). Do yhttps://www.biggerpockets.com/forums/925/topics/1185311-need-advice-on-financing-a-new-purchase#ou cash flow regardless of the scenario? If so, I'd always put the lowest amount down. The additional funds can be used for reserves, down payments on other properties, or closing costs when you refinance.
Nicole brings up a great point. You want to ensure that your lender is doing their upfront due diligence on the deal, has programs to get the deal done if the final numbers come in different(low DSCR requirements, favorable rent guidelines, etc), and is offering you excellent customer service. The cheapest lender may be the cheapest for a reason and change terms down the road or have difficulties getting you to the closing table