Lexie, I totally relate. I think its a big part of my personality that I have been working on...knowing my own limits. I have way too much going on at work, and I've been tackling two huge house projects that really...I should have contracted out for a professional to do them. I mean, really, I am one person and a woman no less (no gender bashing here, just being honest) and I am hauling loads of rock around and climbing up on a 2.5 story roof to paint. Sheesh - sometimes it is ok to have someone else do something instead.
I am fine with having someone "take over" but terrible at initiating a hand off. And I have a new assistant at work so learning to delegate is something I am working on right now, for her sake and my own sanity!
Think of it this way...being so close to retirement with so much to wrap up, turning this project over may be the best thing for the project...like you said, "fresh eyes".