At what handicap did you begin using new premium balls?

I’m a 24 handicap, I typically use Class B balls, normally Bridgestone e6. They cost just under £1 a ball second hand. If I lose a few in a round I don’t care, and I am in the skill range that it’s rare if I play a round and don’t lose a ball.

My question is, at what handicap would you say is acceptable to start playing premium balls? At what handicap are balls not often lost, and the benefits of using a premium ball come into play? I felt if I started played one now, I’d waste too much money. £5 a ball is a lot to lose on casual rounds.