From personal experience, yes you actually will. Speeding up small pieces of a design that's been in your head perhaps literally for years, is an incredible motivator. So is having a "pair programmer" to bounce ideas off of, 24/7 on demand.
I agree with the sibling comment: the difficulty [now, but also before] is finishing.
I agree with the sibling comment: the difficulty [now, but also before] is finishing.