I've heard that Bitmain guys have announced about their upcoming mining beasts loaded with 7 nm chips. What do you think will they cost? I've come to know that they might be delivering around 48-50 TH/s at nearly 1500 Watts which looks quite impressive. Don't ask me about the electricity costs, it's free at his place.
On the other ✋, I'm aware of few of those cloud mining and some rig rental websites like https://www.nicehash.com
I checked there and it pretty much gives almost the same gains as invested per day + very less amounts in profit.
So, during these times when Bitmain is going to launch something which may actually boost difficulty to an all new higher level, should I suggest him to take risk of getting a rig online on rent, or should I ask him to wait for Bitmain to release those miners and ask him to purchase them and mine? Can anyone predict the possible outcome when mining through their upcoming hardware and when will he ROI?
I don't agree, cloudmining is a pure waste of money, you will never ROI, never. If you can't buy an Asic miner (which could go as low as $50 for an used 11T M3), then easiest is to just buy bitcoin and hold.
Yes they are loud, and you are not supposed to have them at home, but still some people do, put them in noise insulating boxes etc.
You can't mine bitcoin with computers (cpus), smartphones or gpus, you'd get a few satoshis at best per month like your brother did, so don't bother.
You should try buying a single Asic miner and get experience from it. It is like buying an AC unit, it has higher electricity demands, 220v, etc. An used one with a failing board or two may even be cheaper and easier to make quiet, such as an S9 with two boards instead of three.