Hi Denning
I work 60-70 hours a week in the city and I am doing the ATPL exams distance learning.... I started last April and will have them all wrapped up this April (fingers crossed).
The toughest part I found has been finding the time off work to do the compulsory class room part of the course and the exams as you have to use up quite a bit of holiday for this.
Other than that frankly I haven't found it too bad to be honest.... tend to always have one of the books to hand when I go anywhere followed by 2-3 weeks of intensive book bashing leading up to the exams
Also I am doing the exams in 3 rather than the usual 2 sittings (10 exams down 4 to go!).... makes life a lot easier I think. As does an interest in all things flying related which means (some of) the stuff you learn is actually quite interesting.
So in answer to your question yes it is certainly very possible to do although naturally you will have to sacrifice a few weekends to hit the books leading up to the exams.
Hope it all works out for you
GSB
