I get that. Mine usually doesn't care how long the project takes, at least as far as the car projects go...unless her car is involved. I'm going to be on the clock for this transmission R&R in her car that's coming up. She can drive my T5, but doesn't want to because of the manual trans. Good thing her work is 1.5 miles from the house and she has a bike (or someone from work will bring her home).This is will surprise many, but probably not you…. I added time estimates for my wife so we can negotiate time to wrap it up.
I use checklists to ensure I don’t miss anything, but I almost never attempt to estimate durations.
I'm working on the checklist for this project. Luckily there aren't too many parts to it.