I agree with Harper here, and I'm still in college learning languages, but WHY do people that call you to come to their house / business / whatever else expect to not pay you what your time is worth?
Would you go down to your local Ford/GM/Chrysler Dealership, bring in your vehicle, explain what you want fixed (sometimes we don't even get that luxury) then tell them you're not going to pay their price to have it fixed?
No, you pay the bill, because they know what they're doing and if you're like me, you probably don't know your timing chain from a hole in the ground, and you'd rather pay them what their worth to do it right than ask them to do it cheaply, not respect their knowledge/craftsmanship and have a belt come off.
I guess another stupid thing that just pisses me off the most is when you ask them for their factory disks, and they look at you like you were supposed to have it. Would a mechanic have a key to EVERY car when you bring it in? Then why should we have every Operating System known to man in our backpacks?