Cash Out Refinance on Portfollio

Hello! I'm looking to do a cash out refinance on a portfollio of 15 rentals which are made of SFH, TH, and Condos. Value is about $1.845 MM and current loan is at 5.5%. Looking to take cash out and lock in longer term financing at lower rates. Either a portfollio loan or individually. I do have 6 other single family mortgages, so loan count could be an issue. Located in Maricopa County / Phoenix area. If you know of a great portfollio lender or way to finance multiple properties, please let me know. Lenders can respond or PM.

Thanks!