Very often those who help and/or support others don't see themselves as anything other than ordinary, doing the right thing comes naturally to them. That is what makes them special. The Baxter boys don't see the good they doing, they only see what is being done for them and do not believe they have done anything to deserve it. To me, that is the definition of a good heart.
Charlie is eager to restore the Mini, he has a lot of knowledge but little experience so still has a lot to learn. Joe is a classic car buff who is thorough and methodical, an ideal mentor for Charlie. He should have the knowledge to source and use only OEM parts in all, or most, of the restoration. He will probably instruct Charlie to place the documentation in one or more protective folders to maintain them due to their value and the value they add to the car. I think Charlie and Joe will make a good team in restoring Harry's Mini. The car has more than a monetary value to Harry, I'm sure he will keep it.
Thank you @drsawzall for your valuable comments, I appreciate them.