i did it for about a year or so. i did fixes for 30bucks if they bring it to me. or +5 bucks per round trip for a housecall.
as long as you are cheaper then geek squad's housecalls, you can make some money. and being cheaper then them is loving easy to do lol
anyways. anything that took (or i knew would take) more then 2 hour visit, i would just keep the comp overnight and charge them another 5 bucks for another round trip of me driving over the next day to drop it off lol.
just keep the contracts and prices simple.
in your SINGLE PAGE contract, make sure you point out that your 3 day warrenty only applies to the problems you just fixed.
plenty of computer dumb people think you getting rid of the 1 virus means the entire computer should be problem free forever and unrelated issues they would try to blame on your for not fixing lol.