Great question!
You can see my direct answer here.

Yes, in some cases I work on behalf of agencies to help them with a piece of a project or the entire thing.

Like so many things in life it depends... Is it only development, only design, only branding, or is it all three? Does the site have only a few pages or a significant number? Are there many collections? Are you looking for lots of interactions and animations (Lottie, Spline, GSAP, etc)? All of these items and more can influence the price but projects typically run $2k - 40k.

Again, this often depends on the scope but typically...
Branding Only: 2 - 5 weeks
Website Design Only: 3 - 5 weeks
Website Development Only: 3 - 6 weeks
Full Project: 2 - 4 months
Timelines can be made shorter but that often involves a prepared client who is extremely responsive in providing feedback.