If you're capable of banging out basic RoR/Golang prototypes which can be used by non-technical email marketers, this skill alone can get you $20k+ engagements to build them with a bit of company-specific secret sauce in them. The sauce doesn't have to be that complicated at all -- for example, "I wish there was a way to send people an email on day N of their trial if their account had less than X objects in it... and I want N, X, and the object type to be editable without having to talk to Engineering" justifies $X0k at a lot of places.
(That's sort of software-firm specific because that's who I typically sold that to. Let's see, what's a more prosaic option. Oh, OK: consider a small insurance company in Kansas which collects a meagre $20 million in premium income per year. There exists a non-technical marketing manager within that company who wishes that there was a way to email business customers a solicitation in December to pre-pay their premiums for the following year to book a current-year expense for tax purposes. She calculates that getting an extra 6 months of float on 20% of their $12 million in business policies is worth approximately $100,000. Can you imagine what you could sell her for $40,000?)
In related news: businesses pay serious money for things which make them money. Consider adapting one's behavior to optimize for this. You can use the resulting money to buy lots of fun things, including stupefyingly large amounts of MailChimp credits if that floats your boat.
(That's sort of software-firm specific because that's who I typically sold that to. Let's see, what's a more prosaic option. Oh, OK: consider a small insurance company in Kansas which collects a meagre $20 million in premium income per year. There exists a non-technical marketing manager within that company who wishes that there was a way to email business customers a solicitation in December to pre-pay their premiums for the following year to book a current-year expense for tax purposes. She calculates that getting an extra 6 months of float on 20% of their $12 million in business policies is worth approximately $100,000. Can you imagine what you could sell her for $40,000?)
In related news: businesses pay serious money for things which make them money. Consider adapting one's behavior to optimize for this. You can use the resulting money to buy lots of fun things, including stupefyingly large amounts of MailChimp credits if that floats your boat.