Well, after taking about 2.5 MONTHS to design my F-35B model (1., was the first time using LLD for a realistic model, & 2., I'm a perfectionist. Almost slept only 5-6 hours a day until it was finished), I spent about 1 hour a day for almost a week to make the base.
I've gotten better at designing these models. It took only 4 days to do the YF-23 (4 looong days).