Is there an extensive contemporary jurisprudential book available online that follows the methodology of detailing issues, presenting the proofs of the different schools of thought, and then favoring certain opinions, similar to the approach taken in your fatwas?

The existence of a comprehensive and extensive contemporary fiqh book that details every jurisprudential issue, mentioning every school of thought, its evidence, and the most preponderant opinion, is rare. And if such a book were to exist, it is not advisable for a beginner to start with it. The recommended book is "Fiqh as-Sunnah" by Shaykh Sayyid Sabiq.