Go for it man, but don't move until you know for sure if the job is permanent. 1 Hour travel is a bit far, but not bad, considering you are going to make twice as much money.
You should also contact excessive amperage, he's a real good guy he's alternators are even better and you won't have to wait 6 to 8 Weeks for a alternator like from other companies out there.
having a big box and more than rated power it could be bad news so i would be real careful with it, at first until i know for sure it can take it depending on your rise you should be ok
i wouldn't do it if it was me as a buyer i will not pay 3000 for that car with those milles and dont pay attention to those blue book value book if you are nobdy pays those prices