You might want to study the Cost vs Value Report a bit for average costs for the projects that you want to do. Good contractors are busy, and not cheap. They earn every bit of their fee. Unless you know enough to perform quality control for the trades work, and to properly sequence them so there is no wasted work and backtracking, then acting as your own GC can actually cost you more money than hiring a good one. Mistakes are often educational. Expensive and educational.

pricing will vary depending on the materials used.

Working with a General contractor vs finding your own sub contractors will save you time and $. What is your time worth? General contractors spend countless hours coordinating projects between architects, owners and subcontractors and have your best interest in mind! A good contractor works with established sub-contractors for years and know what they are capable of.