For prices, please visit: https://www.vidinli.net/store2/index.html#/h?cid=16
(or contact us)
Note that these are per support, per installation prices. A few problems/questions in a reasonable time interval may be seen as a single support request.
Ehcp Professional version details: https://ehcp.net/?q=node/1808
Note that normal ehcp software is still free. (Only professional version is paid)