Data Entry needed to create accounts on my site

I'm looking to add 1,000-5,000 business profiles/created accounts using real business names of business members on our joomla/jomsocial social networking site. You can do it manually or use a software to automatically create the accounts or automatically insert the data. The site is currently empty and we want to populate it with new business members. You will search on the internet for the many businesses in our area and gather their info like their: business name, service they provide, city, country and insert them unto own own site. Do you have any ideas? I'm open to hear how you can do this effectively.