Well....if you are a very serious racer then you must have already made peace with the budgeting aspect of the sport. The high tech stuff is popular for a reason; there are definitely performance gains to be realized using sails that are light and low stretch.
You can increase the longevity of the sails somewhat by taking care to put them away correctly after racing. It is good to avoid
stepping on the jibs
and rolling the sails instead of flaking.
I am the boat captain on a Farr frac.(395).
We average around 50 races a season and use the equipment hard. We replace the main every 2 years on average and the jibs
at around 18 months. We could probably get more use out of them but they start to get harder to trim well and our boatspeed starts to suffer.