I'm interested in the commercial component, if it's not a commercial secret.
What is the total monthly consumption (kW or MW) of your mining rig?
How much does 1 kW of energy cost you? Are you likely to pay industrial/commercial rates?
Do you immediately sell the mined bitcoins to cover current expenses or hold it until it can be sold at a favorable rate?
Have you provided a fire extinguishing (warning) system to prevent the mining farm from catching fire?
Well, my energy cost varies and I wouldn't want to put it here. I will say my farms are all on sites that generate electricity, and that is a big factor in the price per kWh that I pay.
As for consumption, at this farm I am running 36 x S21 and T21, which is about 130kW total with the fans. 3.1 MW per day, 94 MW over a 30-day period.
I don't sell Bitcoin unless I have to. I'm running around 200 rigs total, and I happened to get into mining at a very good time (shortly before the last halving, when coins were around $7000). Following the halving, over the course of several months, Bitcoin price exploded to 6x / 7x what it was when I got into it. I took out several large fiat loans to get into mining, but was able to pay them off in under a year (due to the explosion of Bitcoin price). Since then, I only buy new miners with BTC, so I have no outstanding loan payments to make - only the rent (which is peanuts as they are derelict buildings) and energy cost (which is low due to locations). So I sell bitcoin to cover costs, and also when I want something nice for myself
But otherwise, my plan is to hold for long-term and watch it grow.
I'm not sure there is any system that could prevent a farm from catching fire, however this is an area I am currently thinking more about. My line of thought so far is that it would be beneficial to have some kind of suppression system that cuts power to the miners and fans via a contactor (e.g. when fire alarm is triggered) - but also Co2 extinguishers with heat activation (I have some in the engine bay of my yacht, they have a glass bulb that breaks at a certain temperature, causing the extinguisher to fully discharge).