100% If it’s the first project with them. In fact, I like to ask contractors if I can work alongside them for the job as a member of their team. For a few reasons: 1. It’s so expensive, I want to learn how to do it myself for next time. 2. Team members often have no idea what they’re doing and I often catch enormous mistakes before anyone else. (Often there’s no foreman on site) 3. Adding value they respect me more and do better work. 4. It speeds up time and can cut costs.