You can also connect the RO to a refrigerator water/ice dispenser

Have it drilled please.

Do it right and drill. It's not a complex task.

The quartz countertop itself is $3,500. I'm afraid that I'll break it by drilling. I hope if done correctly, it is safe to do so.

I didn't necessarily mean you should drill it yourself if you're not handy. But it should be a simple task for any person competent in working with countertops

Or reevaluate why you're using RO at all.

It is spam, in the sense that advertising your own company is not allowed,. You may offer up excellent information, but do not insert a link to your own business.