I did mine in 2011 distance learning while holding a full time job. It took me 12 months to complete from starting study to final set of exams. It wasn't helped my work moving me from a site that was 25 minutes from home to one that was just over an hour, meaning I lost at least an additional hour a day to commuting.
Same as the OP, I found it useful to do an hour of study before starting work then I did another couple of hours in the evening. In my favour was the fact I didn't have family or anyone else to deal with when I was at home, so it was always my time.
I also did CPL part time, but took time off to do MEP and MEIR. I'm glad I did that. I'm now in the position of being able to leave my old non-aviation job, hopefully moving on to bigger and better things...