KH director Reagent questions

[AZfishkeeper]

How much reagent comes with the KH director?
What’s the average usage of the reagent over a year?
Can another companies reagent work if GHLs reagent isn’t available?
What's the shelf life of the reagent? Does it expire? long term storage issues?
Are you looking at a concentrate version of the reagent?
Does the reagent need a controlled temperature environment?

These are make or break questions for me and if I am going to buy the KH Director set up or not. I already have a Profilux 4 so I really want to keep things working together. But longevity and availability of consumables is a major concern of mine. I've bought things in the bast that relied on support of a company and that company failed it's customers.