Im at BPP part time evening. Its hard. very hard. But like you, I don't have the option of doing it full time. I've somehow managed to get from September to now, and it has flown. In a year I'll be finished. The exams are quite regular so you won't have them all at once if that makes sense. I had 2 skills in Nov, a skills exam and Business law in Jan, 2 skills in march, another 2 skills tomorrow (Yes- TOMORROW and im procrastinating!) and one in May.
It is difficult sometimes but BPP are good at helping part time students managed.
Without being disrespectful, to get a TC with a 2:2 and no LPC (yet) is a great achievement and I wouldn't turn it down for the sake of 2 years hard work. The LPC level 1 goes through the summer so you wont have time for a holiday anyway, and if youre really desperate for study leave, most firms will give you it unpaid. I'd go for it x