No offense, but if you didn't even know that you don't need a "permit" to run a hosting business, then you should read [a lot] more, before you try to start a successful business.
Also, if you can't even afford an $8 domain, most people (like me), would not even consider your hosting company because a server costs $100< a month, and if you can't register an $8 domain for a year, then I'm going to question your professionalism, your server's quality, and knowledge in the industry.