Hello, My husband and my son and I are from the United States and would love to visit Thailand for 3 months or longer. It would be our 1st time to Thailand. What exactly would we need to be able to go and stay there for at least three months and then if we want to extend another month do we just go to the embassy and ask for an extension? We do have passports what else would we need. We also would like to look around possibly staying there next time, we find a place they are to stay for about a year. Thank you so much for your help.