What should be the most suitable business in CA

Recently when i was studying my uncle went to CA and at the beginning he used be a store keeper in Ontario, Mississauga.. But he had never left studying and now recently i have heard from him that he is a consultant now a days in Atos international.. And he had offered me twice to come and join him but i m a little bit confused what to do........For me i do really wanted to start my own business... and in fact i have taken coaching classes for it and i do really think that any legal activity undertaken for the purpose of earning profit is business but what should be the cost for it and what should i start in CA and know how someone... i also have 1 years experience of marketing...