Angoras do take considerable time and energy, but so does everything in life. For me, the key is knowing the cycle of each rabbit and keeping a schedule. Sometimes the rabbits don't agree with my schedule.
The beginning of my rabbits cycles start in May/June. Most of my buns were born late fall/early winter, and I'm sure that has an impact. My entire herd are not regular molters and hold coats 5-7 mos. I discovered their cycle by trial and error., there is a point between 5-7 mos where little neps begin to form on the ends of the wool, and if I don't collect is, instead of shedding out all around the cage, the coat begins to mat (it's the only time it every mats). If I really wanted, regular grooming could keep that coat past the time. I really can't stand to wait past 5 mos, I want that coat to spin, only show buns are allowed to go past 5. After the big Mini Convention show in May, I begin the clip down so no bunny carries a full coat in the heat of summer. They are clipped again in Sept/Oct, Jan/Feb, May/June. I get one less clipping than those who molt every 90 days, but my fiber tends to be twice as long.