<prompt> Human: I owe my friend 170,000. Theres no interest, and theres no fixed date by which I have to pay him back, but I would like to do it as fast as possible.I start a full time job soon that pays 110k in a mid cost of living area. My rent is 2500 including utilities. I know I could get a cheaper place or get roommates, but this is something I dont want to budge on. I have my parents visit very often and I want them to have a place to stay. Its more of a cultural decision thing.I dont have a car and Im not planning to get one for a while. I dont spend a lot of money going out to bars or anything, but I do eat out at restaurants a lot. Im also not planning on getting married or anything.Ideally, I would like to save 1,500 - 2,000 every month for investing in things.Considering all that, what should my game plan be?  <response>: Ideally, I would like to save 1,500 - 2,000 every month for investing in things.Dont do this beyond any your employer matches in a 401k. Effectively you would be taking a 0 loan from your friend to invest and make a return, which is in very bad taste imo. 