Same here, for along time I've helped people out and done shit dirt cheap, mostly for friends and people friends introduced me to. This is all done with some expectation that if i needed help on something that these people would offer up without me needing to ask or beg them to do so. Ya know the old school saying I scratch your back you scratch mine, well people always seem to forget, be busy, have something come up or some other excuse when you need some help. Earlier this year I decided fuck it and I'm not giving hand outs anymore. My college auto instructor told me to never be a nice guy when it comes to cars because it will bite you in the ass every time. He preached to always charge $50 bucks a hour for advice $100.00 bucks a hour if you get dirt on your hands.
People seem to forget that you doing a side job for them and only charging $100 bucks to do brakes on all four corners and change a oil pan is cutting them a f'in deal. A shop would charge thousands for similar work, then when you ask them to come help ya move some rocks in your yard they're not feeling well or busy...
I do a lil wiring stuff on the side, small jobs here an there. I considered wiring cars for people but quoted a couple guys prices and got replies saying its too expensive. The quotes I gave these guys is a third to a quarter what a wiring shop charges, i don't get it shit wire is not cheap and to do a nice clean job wiring something is time consuming an tedious as all hell.
blah rant off.