How long to study and take all 3 exams?
 

I only want to spend a couple per week on this certification. Does it make sense that each exam should only need my focus for a couple months and complete in a year tops.

I would recommend taking the tests individually as it is a whole lot of material to memorize. Try to finish each test as close to the other as possible so that you do not forget the material. A year is too long, try finishing it quicker.

I spent about 8 weeks on each section and that worked out great for me.