Time, that would be an interesting thread on its own......... I am a weekend warrior with my projects and with my real job starting to be long hours it is hard to drag myself out of bed on a weekend to go play.
I don't have to worry about the cold but the heat sucks the life out of you. But this is all the hands on work, how much time is spent on the other bits, finding manuals, chasing parts, chasing suppliers. I wonder how many restoration people are workaholics.