Nooky, out of these 9 fatal accidents how many were due to mechanical failure vs. pilot error. I haven't been around in three years or so but only know of one related to mechanical failure. I know of 4 others due to pilot error. Don't know about the other four you refer to. I flew out of Brackett for nearly ten years and instructed at ADP for a little over a year. Granted ADP may not be perfect, for instructors it's probably the best place to work in the area for building experience and time. Most of the instructors while I worked there flew 80-100 hours a month with plenty of multi students. It wasn't uncommon to have 300-500 hours of multi within a year.
Back to Cougar 6903s question, ADP may be flexible enough to let you have weekends off. When I worked there you basically could set your own schedule (within reason). You only get payed when you work, and only need to be there when you have students scheduled. No siting at the desk waiting for someone to walk in, etc. That being said the instructors who flew the most were the ones that showed up at 8:00 and sat on the couch for the unexpected assignment even if they didn't have something scheduled. Most of the students come from outside the local area for one of the packages and want to fly a lot in a short amount of time. An example would be someone showing up on Monday morning to start a CMEL or MEI and flying 10 hours or so with a checkride Wednesday afternoon. This kind of stuff would be placed on your schedule usually a week or more out.
As far as the accident rate, ADP had/has? nearly 40 aircraft that are flying almost continously. The school probably logs more hours in a day than most do in a week, or even a month. (This is one of the reasons there aren't to many locals renting there. It can be impossible to get an aircraft if you haven't scheduled it far in advance. ) I would imagine the accident rate/hours flown is pretty typical versus most schools.
Do a search on this site for ADP for additional info as this has been discussed before.