1. I used to, but not anymore because it's not profitable and higher rank Asic miners costs even more right now, I am waiting for new Asic miner before I go back into action.

2. Solo mining is like buying the lottery ticket, I don't recommend, I use popular mining pool.

3. I mine in a separate room where I live, I abandoned the room for mining only because it's not healthy to stay in the same room with degrees of heat everywhere, I believe using facilities comes to mind if you want to run many miners at once.

4. If one want to invest in mining I believe right now is the best time, because the price are better and it will increase once Bitcoin price starts making new highs, and profit wise will be way better than what it is today, a $2000 worth of asic miner can go up to $3500 or more in a bull market.

Mind you if you mining now it's smarter to hold your Bitcoin, and sell when we are over $70,000 again, hopefully by 2024-2025.