Those quantities you listed mean nothing without knowing how many square feet you have.
Also, "custom" and "spec" don't really belong in the same context.
I do mid-size custom homes which have those kind of specs and quantity, and I'm usually nowhere near $10 or $12 per sf.
I recently wired one that was really a duplex but listed as single family + ADU - about 4500 sf with 400 amp service, 2 kitchens - all electric. It was a spec home with about 80 cans, 5 circuits in each kitchen, total 5 bedrooms and 5 bathrooms, with soffit mini cans outside, data in each living room and all bedrooms.
Total was $19,000
I did a 3800 sf custom with 4 bed, 5 bath, 9 kitchen circuits, 2 separate garages, 95 gimbal cans including exterior soffits, car charger, data at TVs, 12 ceiling speakers, bathroom floor heat and more.
Total was $24,000
I don't know if maybe you're using MC cable or conduit, but if you're using Romex $10/sf seems like a really good price.