amazing plan to move the boards! I use string lines also. I suppose it would be possible to align boards with a clamp. Just put a block on the edge that's out of line, and clamp to the opposite corner. Thank you for the video!
God where do you live, lol. I’m thinking of buying a cheap house and the roof is sagging so bad. I have no idea what kind of money it will take to fix the sags but it is pretty bad.
Indiana. It really depends on how bad it is when it comes to price, not to mention location. Zoning, permitting, licensing and the like can effect price greatly. It is a simple process. Not easy, but simple.