Ask HN:Is this a good idea for a security startup?

I was wondering if this would be a good idea for a security startup, let me know what you guys think. The idea is a company that does passive reconnaissance for penetration testing companies. Basically penetration testing firms would hire us to the the leg work for their external pen tests, this would include passive and semi passive reconnaissance for their targets. The idea came to me while I was doing a penetration test and I was doing very tedious reconnaissance work.