A month or two...
Ahhh you're still wet behind the ears, or- very ambitious!
Don't take that negatively. I thought the same thing. I've been two or three weeks now just working on the underside of the roof. AND I am unemployed. Granted, I've been a bit lazy due to frustration at the tar I'm having to remove.
People show up to "help" but in reality its going to be 99% my own hard work. Most friends show up and drink beers, and give me lots of unsolicited advice/opinions. Lately the main theme from my buddies is "I'd leave that tar" and " theres no reason to do that". After a half dozen of the suggestions I start to get really annoyed. Getting anyone to do any actual hard labor is next to impossible.
That's ok, I'm fine with it. I'm just going at the pace that feels right.
I made sure I had THREE places available for working on it and storing it. The first bus I got I lost due to not having anywhere to keep it. It can be VERY tricky depending on who you are and where you are.