Get on the email list with Czechpoint-usa.com. They are out of stock right now but they seem to show up about once a month or so. Be ready to spend 1.5K :)
Not affiliated with any HVAC companies but now is the best time to get the best deals on AC. I suggest calling HVAC companies in your local area. Calling is free and you will get plenty of good information. Some companies even come to your house for free consultation. You do not have to commit...
Caveat Emptor! Buyer beware when it comes with buying used AC units. But it's your money use it at your will. What is your budget? Some HVAC companies have 5 year payment plans. If you are planning to stay in the house 10+ years this maybe your best bet.
I am not an expert (but I did stay at a Holiday Inn :) I am assuming you are a handyman. The power source and Amp should be adequate for the unit plus other appliances you are planning to use. A dedicated line with the appropriate breaker is more desirable. The A/C unit's BTU also should be...
Got the exact same model made in 2013 loved it so much I ended up buying 3 other CZ's. It fit my hand like a glove and makes me look like I can shoot :) Like some folks here said, shoot the heck out of it and the fire control system will all get better. Enjoy it!