I'll take the liberty of judging from your name that you are from India.
For mining Bitcoin, you need special machines called ASIC miners. They are manufactured by a few companies like Bitmain, Cannan, Innosilicon etc. Unfortunately, due to the ambiguous legality for cryptocurrencies in India, you will find it very difficult to get them through customs. Getting your hands on miners can also be possible through resellers on the forum or you can check someone like @kaboomracks on telegram.
Another option is to mine Alt-coins using GPUs and then convert your earnings into Bitcoin.
Mining doesn't need a lot of knowledge to get started. Most of it is available online. What you need is a large initial investment, access to cheap electricity and securing sufficient GPUs/ ASICs in the backdrop of a bureaucratic, non crypto friendly body like Indian customs.
We can't really answer you that question if we are unaware of your budget. Generally, yes, in order for people to maintain the network, mining is obviously profitable for them.
You should read this: How does mining work in Bitcoin?
I guess we should answer him/her by giving the things she/he need or can do to start mining. For my own opinion it's unnecessary to to know her/his budget. But I agree with you that they gain profit in mining. I've seen in some of the comments in here that she/he might from India and based from my research India propose a law of banning cryptocurrencies and will fine anyone trading, mining or even just holding these digital assets, a senior government official told Reuters. So might be careful before starting. Do your research. Good luck for your mining journey.
It would be better if you can check them for yourself if mining is profitable.
Use this link to check them
For ASIC miner:
- http://asicminervalue.com/
For GPU miner:
- https://whattomine.com/
Now decide if it's profitable just minus the Electricity rate in your country.
All ASIC miner is Plug'n'Play just set up the pool where you want to mine and it doesn't need any special equipment just provide 220v+ power and internet you can run them and mine coins.
And I would like to suggest you read this for starter small farm or big farm.
- https://bitcointalk.org/index.php?topic=4636521.0
the basic reply is do you have low cost electricity??
if yes even the 5 years old asics will make profit.
generally start low read learn and go further on
my stolen account Lowbander80 was Legentary
Mining since 2013
1JgddX4AWtLxn9G3hMFzR99CVcZk2U66mQ
Don't fool on this there is no Bitcoin bot system that can mine BTC they're most likely scam like Cloud mining sites.
If you want to start mining read this first https://bitcointalk.org/index.php?topic=4636521.0
For ASIC daily profit, you can check it here http://asicminervalue.com/
Recently I read somewhere that mining has become less efficient, as people are illegally mining. There are many technical changes that are going to be implemented for mining. If this is true.
Been living under a rock for the past 7 years? Bitcoin mining gear has been becoming more and more efficient since at least 2013.
The only illegal mining is either where a backwards country decides to make it illegal OR where people steal power to do it/ People doing mining in those conditions are idiots.