How much time do you have to put into getting this started? I know some people jump in and think its a one-two click punch and they are done. Just because you are going to be a reseller does not mean its going to be a cake walk.
Please your clients & thank them from time to time.......they are just like groupies that keep the band going strong.
Being in the hosting & domain industry isn't any easy thing to do, A big competition running and people always look for trusted registrars with high rates & reviews. To start it's easy but to continue it's better to put a complete business plan which include all aspects of providing services, support, pricing and most important marketing as local marketing an internet marketing.
It will take from you so much time to reach your goal and be known as an advice you have to use 60% of your investment for marketing to reach out the market fast and easy!