Partners
A partner can have many benefits.
A silent partner who brings cash to the business can reduce the amount you need to borrow and that reduces the amount of the loan, so the business has a lower amount to repay. This means that the business can grow faster.
A partner can also add working capacity, enabling the business to do more.
Finally a partner with different skills to the other partner may secure the business. A partner with business skills but limited experience in the field of the business can benefit from a partner with skills in the field, but limited business skills, and vice versa.