Mine is internet based business.

Which type of investment entity is the most leaned and which is the most inflexible ?

The main ways to raise money are borrowing it from a friend, a family member, or a commercial lender, or selling ownership interests (equity) in your business. There's no hard and fast rule about the best way to raise money -- you'll have to evaluate your situation and decide what kind of loan or investment you're willing to take.

do you have a detailed written business plan? without one, you have no hope of getting any investments

Mine is internet based business.

Which type of investment entity is the most leaned and which is the most inflexible ?