Turnaround in exam has partially to do with them analyzing the ‘tryout questions’ – the small body of volunteers available to write and review exam questions makes it difficult for rapid turnaround. I’m assuming you’re heavily lobbying local veteran professionals to help chip in on the process.
Exam study books are the books the writers of the questions are referencing (part of the question writing process is identifying where the information was found). I found that the study materials from the 70s and 80s were far more comprehensive than the more recent literature (and I’ll say Landscape Architecture Graphic Standards is pretty comprehensive in its scope; I’d argue between that, Site Engineering for LAs and Chapters 9/10 of Heinze’s Construction Contracts you should be able to pass all 4 sections).
Exam fees are comparable to architecture ($1470 + state authorization ~$150 for ARE, 1780 for LARE); again we suffer from smaller bulk discount.
Most chapters of ASLA are busy with dealing with the state boards and state legislature (many of whom limit our practice or are trying to remove our license) – it’s how we ‘stick up’ for the profession: increase our ability to practice by adding ‘landscape architecture’ to the list of qualified professionals on legislation, limiting other under qualified groups from practicing landscape architecture (surveyors, interior designers, landscape designers), protecting liability in emergency response, etc. Also, note that it is a volunteer organization and relies on participation by its members.