Entrepreneurs who write their business plan themselves not only spend a lot of time on it, but also run the risk that the result is not usable. Creating a bankable business plan requires business knowledge, marketing know-how, experience and an understanding of what banks and investors value.
You run the risk that you will not get your financing with a self-made business plan. The opportunity costs are then much higher than paying the consulting fee if you have the business plan written: The costs of finding alternative capital and delaying your project until the business idea fails are much more serious than the fee for a business plan expert.
So weigh it up well. The decision to have the business plan drawn up and to invest costs of 3,000 to 5,000 EUR (these are average values from many projects) has proven to be purposeful and profitable for many entrepreneurs.