Business Partners, LLC | 44 followers on LinkedIn. CU Business Partners, LLC is a CUSO (Credit Union Service Organization) currently owned by sixteen credit unions. Business Partners sole focu is on the origination, underwriting closing and servicing of Member Business Loans (MBL), primarily consisting of loans secured by income propery. Loans range from $750,000 to $15,000,000, with a target loan size of $1,000,000 to $8,000,000.