1. Yes, if both applications fail and OPT expires, the candidate has to go back to the home country. 2. Working for a big company will not help in getting a H1

1. Yes, if both applications fail and OPT expires, the candidate has to go back to the home country. 2. Working for a big company will not help in getting a H1B slot in anyway. 3. Typically, these things are done by a resident starting the company and hiring the cofounder.