No writing Business plan is not rocket science, it can be written by any person who understands little bit of basic financials, usage of excel format and little bit of research on Google to understand what investors look at.
As the saying is you know your kid much better than other’s the same thing applies here, as its your product or service, so the vision what you share and have thought no other consultant will be able to look at it, but at the same time business plan writing consultant will look at your project with neutral look not praising or criticising it.
As when you write you tend to develop blind eye towards little things which can trigger the fall or collapse so its advisable to show to consultant for second opinion. Or if you don’t have time to sit and draw then you can look for Business consultant. Also remember it’s not rocket science where in you need to spend in lakhs if you are start-up company, yes big companies or well established companies don’t mind paying for getting business plan done from senior experts.
But as start-up all you need is a basic document which explains to you what is the minimum revenue you need to bring to table to sustain and survive in market, it’s not a document which will assure you funds.