i want to go to america but i have no much money to get travel visa. how can i live & work in usa .?

you can get a sponsor or get a company to hire you and they do visa for you. alot depends on your country

If Your in a School you will be able to travel to america for learning purposes

Just swim across the river and come on in. Thousands a day do it and no one cares. Do you have any skills? That doesn't matter either. You will be given preferential consideration over citizens for an SBA loan to start your own business. Just come on over and someone will hire you and, if you don't get a job, don't worry, you can go on welfare and have your medical bills paid for by Medicaid. In January when the new congress takes over I am sure the will give you Social Security and anything else they can think of, maybe even the right to vote so they can stay in office by giving away money earned and taken away from legal hard working citizens and giving it to illegal aliens, and special interest groups.

get a BSN degree and apply for work here in the US either through an agency or the US embassy at your country. The US immigration gives immigrant visas/status to skilled workers such as RNs (which is the only skilled work i believe that is the easiest to apply for.) OR to make it easier, marry a US citizen, then you'll be one soon!