Good day, sir!
I have read your attached PDF file and although some points about Security are not clear enough and I have some questions about the database main structure and about the Project templates part, I'm pretty sure I can make the web-app for you if I'm given enough time. You provided all the details and that's good for a final product that satisfies your needs. If I am to be chosen for this project of yours, you must be available so that I could show you the progress and get the feedback from you.. We could do it piece by piece, feature by feature, so the final web-app will meet all the requirements you had provided.
I'm always available, so do not hesitate to contact me anytime you want, in case you have any questions.