Hello guys, my parents are low on money and I just turned 18, I was thinking about building custom computers for people and selling them for the same amount that I bought the parts for plus the building fee, I made a small advertisement for this idea near the place where I live, and two people are interested in buying a computer I would build for them (for around 500$ worth of parts).
My question is, how much in your opinion would be a reasonable price to taking for the process of helping decide on parts, and building the computer. As well as how could I make this work? I don't think I could just expect them to pay me so that I would get the parts before I have even ordered anything, I understand that that would be a risk for them that they wouldn't take. At the same time, it would be a risk for me if I would want to buy the parts myself and build the computer and then get a message from one of them saying he changed his mind etc.
Can anyone help me with this? I would love to help my family with some income, and I think I got a shot at this if I could figure these things out.