Time estimate for renovation seems long - opinion?

I recently received a time estimate from a potential contractor for renovating our 1500 SF 3BR apartment home. Here are the major items: Remove existing hardwood floor Install new solid wood floor Install about 15 bi-fold doors on various closets All new trim Prime and painting of entire home including new doors and trim No plumbing or electrical is involved. The 1500 SF includes 3 small bedrooms, two hallways, two bathrooms, a small home office, small kitchen, medium-sized living room, small dining room. He is telling me about 10-12 weeks. This seems a bit long to me - any opinions?