yah real world business is quite different than virtual business and same the method of advertisements are diff for both type of businesses . but i think its really good have some advise from some expert to start business , although virtual business requires low investment and even you can start business on behalf of others like affiliate system or cpc . but in real world you will have to analyze all aspects and asked to business experts listed here Trantr http://trantr.com/category/finance , but still choice is yours , as risk factors involves in every business .Good luck