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Get a database of small web dev agencies (companies that have around 2-3 people at the most) and offer subcontracting position. You are likely to get at least one or two positive responses if you write to hundred such companies. That should easily help you sail over $500 a month.
Agreed. This advice is not scalable either - should I be carrying a ruler, a bottle opener, screw drivers all separately because startups only focus on one thing? Logic tells me anybody would prefer a 'wallet ninja' like product instead.