In India, the person is expected to register his company or business and also obtain permission from the municipal authority to carry out the business in that geographical area.
A patent search will bring a similar invention to light and along with that, the areas that are patentable will be emphasised even though prior art for the patent application is present.
Early filing of the application prevents any other application to become prior art to your patent application and also gives time to make any additional development in the invention.