I have phoned 2 companies and all I kept saying was 'what's the cost' etc and neither would be precise either about cost and running costs or about is it the best for our outfit.
The company I chose for my system were the opposite, prices we all there, when asked. I have an objection to buying products without a price tag on them, it suggests to me that the seller is seeing how much he can screw out of you!
And, beware of those who try to blind you with science, like how much pure water it produces an hour, or the resin costs, etc, keep your eyes and ears open!
PM me if you'd like the details of the company.
Doug.