You're basically asking - how do I make $$$? Gaining customers/users is the cornerstone of any commercial website, and there's no magic pill. Your options are

You're basically asking - how do I make $$$? Gaining customers/users is the cornerstone of any commercial website, and there's no magic pill. Your options are usual 1) Advertising (I would try mechanics/docs/vets forums) 2) Sales (direct calls or even visits) 3) Building such an awesome service that people recommend it to their family/friends P.S. you should've thought about it before you started coding the site.