I'd charge far more then there going to want to pay. Most people when you tell them a dollar amount for working on there game they about a heart attack. Plus there is no way I'd do it at there house because its going to take 20 hours minimum (even to do a "light" shop job) and I'm not spending the night there.
I guess what I'm trying to say is I wouldn't touch it, even for the $50 and hour price because at 20 hours that's $1000 and there certainly not going to pay that. If you figure $250 divided by 20 hours now your down to $12.50 per hour, plus the moving of the game back and fourth....blah blah blah and then hope they don't call you when one of those new light bulbs goes out, which they will unless you change out every socket in the game and then your talking major time.
This is why I've given up on working on other peoples games. The dollars don't make sense but they certainly turn into cents the longer your tied to it. I'll give them all the free advice they want on how to go about doing it themselves though, I have no problem with that.
And that's just my two cents.
John P. Dayhuff
Battle Creek, MI
269-979-3836