I'm in a similar boat here (work 9-5:30PM M-F). What I've been doing is drilling Monday and Tuesday, PT on Wednesday, BR the rest of the week while continuing to drill (drilling daily is a must, it keeps me fresh and feeling productive). With a schedule, it can be easier to approach studying even with the long hours of work you're doing daily. I get your feeling that you may not be at your most optimal condition to take a PT after getting off work, but if you reserve a specific day for PT and anticipate that, it can make the task feel more doable.

It says "the only" which is group 1 sufficient.