Depends on what you really want to do.
Franky1 gives a great breakdown, you could just grab up coins and sit on them; this works for people time and time again.
If you do go the facility route it's not a bad time to get established but things can change very quickly. Here are a few topics you can read through to help you try and think of everything, like is that the toal cost of electricity including service fees.
Current List of Competitive Hardware - October 2018There is some really efficient gear coming out. The second hand gear or EOL gear that is out there is a good price but at your electricity prices you have to wonder will they be efficient enough for long enough to make a profit. The Avalon 841 is not bad in that regard with the reliability and efficient downclocking. The S9 has become a little more efficient with the AB firmware but there are some reliability issues that are hit and miss.
First time/Small miner reference for getting started.This was geared to home miners but the concepts apply.
Now if you do build this facility, I've often suggested to others set aside a portion of the facility to offer hosting. You would already be establishing a secure facility for your investment so that's taken care of. You will also be (you mention you are) or have someone knowledgeable in troubleshooting and mine management. This way you are bringing in some revenue to help cover operating costs to increase profitability.