My company specializes in user and customer acquisition for mobile and web based products.
You need to publish tidbits of how to accomplish this online for free to become an authority on the subject. When you become known for this then companies will pay you to consult on it.
In the short term, partner with development shops who build apps for customers. Get them onboarded as resellers and have them recommend you for the post launch acquisition of customers.
Check the store on http://chanimal.com for a great reseller program kit to get started with building a reseller program. Call me on here if you want some more help.