Ozone UV vs Salt

They push hard because of incentives. I'd push UV if I got to win this trip to Hawaii:

Last I checked the incentive program for salt was 50% off a Denny's grand slam breakfast.

High ch levels can & do cause scaling - that holds true whether you have a swcg or not. If possible top up the pool with softened water.
With careful management of your ch, ph & csi you should not encounter those issues nor should you have to replace your cell every two years so long as it is properly sized for your pool.
Btw- I think you have all the uv you can stand for free in your locale I certainly wouldn’t pay for more (which consumes fc) & still have to pay for & dose with chlorine.
Get a swcg that’s rated for at least 2x’s your pool’s volume or larger & follow
Here’s a bunch more info too:
Also its my understanding that the travertine needs to be sealed. I would imagine that’s a good idea whether you use a swcg or not.
Many pools in arid locations with high evaporation rates end up with salt levels high enough to operate a swcg after only a few years anyway.

Titan7 said:

I can’t believe the hard sell on the ozone UV vs Salt. I am told the water is so hard in AZ and the salt will make the tile covered in calcium. It will eat up my travertine deck. They said if I do salt there is no warranty on the travertine, although, I am not really sure what there is to go wrong with travertine?

I just can’t figure why they push it so hard?

I had a salt cell in my last pool, had to replace the cell about every 2 years at about $800 a pop.

decisions

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The only way to not have salt in a pool is to never use chlorine. It will always add a little with each dose.