How is crunching minutes marketable?
You have to be careful with time bound stuff. Just because project/time trackers exist, doesnt mean they are profitable. There is a fine line between implications of crunching time and crunching jobs. (shoot for crunching jobs) Additionally, services like toggl.com struggle to exist as a pricing model, considering the amount of free tier or open source task/hourly tracking solutions out there.
Not trying to be negative, overall its sell-able, but the platforms you may think are interested are already saturated.