OK I do this as a part time job. I started working for a small ISP / Consulting biz during my senior year of high school and been there since really.
Ok Phone support fucking sucks ass, people asking how to do shit, and they expect you to tell them how to do it for free. Removing virues and spyware onsite fucking sucks. You sit there doing nothing while the scans run. Sure you can charge that the time but it is fucking boring. I like at the office where I can kick off 3-4 spyware/virus scans at a time and let em go. We charge $60/hour with 30 min minimum. We should bump that to $60 minimum for sure because the same peopel keep bringing in the same pcs every month because they are so fucking stupid.
I wouldn't keep anything in stock, maybe a cd-rom/burner, floppy, network card etc. But just for testing puroposes. If theirs is broken, tell them you will have to order one and then mark it up 40%.
Just be prepared for the on going phone calls and stupid shit that comes with it. I would straight up tell them it would be $60 minimum for you to look at it, and offer no free phone support unless they already paid for your service and have a question on the work that you did.
Just my thoughts
