Paradise Travel Company

I know travelling the world on a holiday would cost ALOT of money, so is there any inexpensive way to see the world and experience different cultures? I don’t think I’d want to join the Peace Corps, though, b/c I heard the government sends people to disease-ridden places, where you can catch them..is backpacking across Europe with a friend unrealistic, if we’re willing to grunge it? How much money (an estimate) would it cost total to travel and explore the world? Thanks!Answers appreciated!