I'm sorry that I'm a little late in the responses here because I'm reviewing the plan I'm going to make, I'm a little wrong at this point about what I'm planning to buy. But here at nicehash, It seems to be okay and I got interested in this matter. And I think the NVIDIA Tesla A100 mining hardware is the best based on my review on the website you provided.
I hope you've read the disclaimer which state you actually don't mine Bitcoin. Additionally the article is slighty outdated since newer GPU type (such as RTX 4000 series) exist.
Check electricity price on your area and reserve location (e.g. your basement) to host your mining
I have a small stock room and I will put an aircon before I begin to host mining here.
Sounds good. Many miner use such room. I hope your electricity price is rather low ($0.06/kWh or lower).
Do you think 0.18$ kWh will be good to say that I can break even for this things If ever I begin to mine Bitcoin?
Honestly, this is what I consume here in my home according to per hour based on kWh. So I think, I supposed to
expect a high cost for the electricity for the first month I guess. But I will observe it for the first trial as of the moment.
If the price of electricity is more than 10 cents, then it is better not to start mining. And do not forget that there will be a halving soon, and the cost of mining will increase greatly, and if the price of bitcoin is cheaper than $30,000, then you will not pay back the equipment.