[Web Design Help]

For the responsive design you need to work with custom programming it is very difficult for every one. Two main thing that you help for creating responsive design is experience and Command deeply HTML and CSS. 

[Email Marketing Vs. Social Media]

I suggest you Social media is big source you can target your local area and share your product. Keep in mind 30% traffic you got using of social networking website. when you talk about email marketing is cheap and less business method just spend money.