I'm not sure charging $10/month is the right way of monetizing this service. It's useful, but you have to think is it valuable and critical enough to pay $10/month? For "consumers", you should target somewhere around $3-$5/month. That too, not all consumers will pay this - so you have to have some Freemium approach. I feel current version of service should be Free and do Ad-based revenue. And then you add more advanced features based on user feedback, and then make that Premium plan with no Advertising.