I may not know much since, I'm just looking to launch my first product next month, but you need a domain name and hosting. This is the cheapest business you can get into. $7-10 for the domain name for a year. $2-10/mth for the hosting. If you can't afford that, than you probably have real money issues that need to be addressed.

It's so easy and cheap to put up a website and it brings such a sense of professionalism with it, that it's stupid not too.