Well, I do do a lot of similar work in the summer. My dad is always building something. Last summer was mixing cement/pouring the foundation of the new addition to the house. In the fall/spring it is/was doing the roof (joists, etc.). This summer will be doing all the plywood/sheetrock/stucco, etc.
Problem is, I can’t help for more than 20 minutes or so before my back flares up and I become useless.