I use Elixir HD light on my Yamaha SLG200S. I notice my G string is usually the first to develop kinks / gets frayed. Of course, when I change, I change the whole set. Is there a setup issue with my guitar or is this a common phenomenon? BTW, My guitar is highly playable and holds tuning very well.
It is pretty common for the wound G string on a steelstring guitar to be the first point of failure, as it has a really thin core and is right in the middle and thus always in the way of strumming. Many guitarists just accept this, and simply replace strings every week anyway.
If that's the case for you, then certainly consider switching to some cheaper strings. Elixir are, I would say, more for gentle long-life playing.
You could also consider switching to an unwound G-string, perhaps even an electric string set. Arguably, the whole point of unwieldy bronze acoustic strings is to project more volume, but on a silent guitar that's completely irrelevant.
However, the bridge may need adjustment since an unwound G-string has a different intonation behaviour.
Usually it was the 1st string or D string that was most worn on my guitar because they are the thinner strings with the biggest tension.
I never replaced the whole set because the others were still useful. The sellers could hear my protest when they wanted me to buy a whole set and I needed only one string!