Sending offline leads to online video sales pages

I am putting together an SMS marketing system for a niche industry so they can offer coupons and etc... Cold calling will of course be the main way to promote to this industry. My problem with cold calling is that its much harder to sell people on a several hundred dollar a month subscription over the phone. They will quickly say "No thanks" and they are lost forever. The idea I had was this: Get them on the phone and tell them I want to help increase customer retention and attract new customers. This will create a little interest but before telling them what it is I request that they give me their email so I can send them more info. This way I begin to build a list right away from everyone I call even if they arent interested from the start, maybe they will come around down the line. Once I have their email. I will send the the info and tell them about my service over the phone. I will try to close them but I think most people wont go for that right away. The email that I send them, sends to my website where there is a traditional "sales video", like the one we see in the IM niche as of recent years. It will be super informative and show and explain to them exactly how and why SMS will benefit them and at the end have a call to action to sign up. I will then separate people who convert and those who still havent and send them follow up emails accordingly. For those who converted I will send emails to help them get started and for those who still havent, continue to send promotional emails of why they need the SMS.

What do you guys think of the overall plan and especially using offline marketing tools in combination with traditional online sales pages that I feel convert better once you get a targeted user to watch it.