1- The Aruba cloud is only for IAP?
Yes
2- If the Aruba cloud is for AP, what is the advantage for the client to have the Aruba cloud? The client can change what he want with the controller.
The advantage is that is like a airwave(with not soo many features) you can configure IAP clusters from it, you got alarms, you got reports etc.
3- If a client have 3 IAP and he don't have computer tech on is site, the Aruba cloud is a good product for the maintenance and repair?
dont understand the questions
4- What is the price for the Aruba cloud?
It would depend on your local reseller, you need to contact an aruba partner, our price might be not the same of another partner price.
5- What I have to do for connect Aruba cloud to the IAP? After an installation, a client can buy the Aruba cloud or he have to buy the cloud before the installation?
I balive you can buy it after if you want...