Interesting question - curious as to why you want to start this business if you have no IT background? Ultimately it depends if you're bootstrapping to start with or have a lot of capital to invest - broadly, unless you have a technical cofounder I'd say you have a fairly daunting task ahead of you if you proceed.

You should really read this book. It should answer most of your questions

"Starting a tech business"

http://www.amazon.co.uk/Starting-Tech-Business-Practical-Applications-ebook/dp/B007L7M0Q2/ref=sr_1_1?ie=UTF8&qid=1393976299&sr=8-1&keywords=starting+a+tech+business

You're at a disadvantage. Maybe you can rely on your friends for technical expertise. But on whom do you rely for business strategy as it relates to the IT field? Right now you feel that it's necessary to ask people who won't be on your team whether you have a chance and what your business model should be. To me that sounds like your team will be incomplete.

Better to start a company where you feel confident that you (collectively) know the segments you need to take care of.

And better not to work with friends. Work with acquaintances. Friends are tough to fire.