<prompt> Human: Hi, Im 18 and have been working construction for a while now. I have 6500 saved and make about 2500 a month. My monthly expenses are just under 450 dollars. My company pays for my living expenses since I work away from home. I probably spend about 200 a month on things like concerts, eating out, clothes and such. Im a really big car guy and Ive been wanting to get a nice sporty car that I can drive to and from work while also taking drives around the area. Id be financing with my sister as a cosigner, she has good credit 730 and the only history I have is my credit card which Ive made every payment on time. Im mainly looking at cars in the low 20k area, is that a bad idea?  <response>: You should wait until you can buy it on your own, save more, build more credit, etc ... You shouldnt lock your sister up into a 5-6 year deal that she cant get out of without refinancing the loan. 