What are some really cheap ways to travel?

I want to find a cheap way to get from South Carolina to Detroit Michigan. I can't afford to drive or take a bus because I only have about 75 dollars. Is there any cheap ways to travel? I heard that sometimes people can travel on buses that are very very inexpensive. I desperitely need some ideas. Thank you so much.|||Might want to look into train line, which can often be cheaper than a bus. If that doesn't work, look into greyhound.|||I'm not sure if I've ever heard of anyone getting from South Carolina to Detroit on $75 before. I think that your best bet is a cheap bus line, like Grey Hound. Other times, there are car pool groups that can be taken. Sometimes, these aren't the best option for safety reasons. Good Luck :)