Since you are going big and are new I'd look into the Giga Watt ICO
http://alturl.com/ugese/pw=gaJyD
Check out their instagram
https://www.instagram.com/gigawatt_mining/
You'll lock in 3.3c kwh and they do on site repairs. If your miner breaks down you have to ship it back to Bitmain in China at your own expense and wait to get a new one. In general problems are rare, but I've only had 3 Bitcoin miners and had to send one back (R4 home miner) and it took two weeks and $90 shipping even though it was still under the 90 day warranty. Considering Giga Watt does on site repairs you'll have limited downtime and no shipping costs.
Problem is if you are putting your entire budget into the 22 miners, doing the ICO will mean less miners. That's the problem I'm wrestling with now. The upside is the tokens last 50 years and you can rent them out to other miners, the calculator on their site shows lowest rental rate gives 36% return. So less miners now but the tokens will generate income longer than the miners. Anyway if this is your first time mining investing that much money I'd partner with professionals and do the giga watt ICO, but unless you have more money or Bitcoins to invest it will cut into your budget for miners. As for reliability Bitmain are reliable, you shouldn't have problems, but they are running full power 24/7 so shit happens. I wouldn't count on having no issues with 22 miners operating 24/7 for 2 years no matter how well built they are.