I did ACCA part 1 about 20 years ago.
That was a full time course at Poly. I could have stayed on and done parts 2 and 3 (I think, or it may have been 2a and 2b), also full time. My class mates who did stay on found it harder than part 1.
That's the sum of my knowledge.
I'd think you'd want to look for day or block release options.
I'd also think that ACCA would be able to advise on what is OK and what isn't.