You can read this to have more information about mining in Nigeria:
https://bitcoinmagazine.com/business/nigeria-bitcoin-miners-will-profit#:~:text=Nigeria%20is%20leading%20Africa%20in,challenges%20to%20find%20economic%20freedom.
According to the article, it is stated that the whole Africa are responsible for only 2% of bitcoin mining hashrate generation.
Although, there are miners in Nigeria, according to this research:
https://ccaf.io/cbeci/mining_map, also in other Africa countries most especially the white African countries, Nigeria, South Africa, Angola etc.
There are some regions in Nigeria that electricity is constant. I remember when I was in North part of the county, Katsina. If the light is not good in their GRA, they still have more than 12 hours of light, but if their light is good, they get over 23 hours of light daily. Also in Batagarawa, a local government in Katsina that I have gotten to, they almost have regular light supply. But I do not know about now.
I was on a call with a friend sometimes ago, he told me how electricity in their area is very good. That is in Western part of the country.
But generally, we have poor electricity supply in Nigeria. In my area, we hardly have light and now the transformer is not good again after it was repaired 2 weeks ago. If you want to mine in Nigeria, you can do more research about where there is good electricity supply, so far you can pay for the electricity that you are using.
But the problem is, the electricity that is good here today may become bad, you should be prepare to change your location again. I am not a miner, so I may not have the accurate information. But I know that there are some miners in Nigeria, although they contribute negligible hashrate to the bitcoin network.
how profitable is mining here?
I believe bitcoin mining would be profitable in Nigeria, if you can have access to public electricity, not from diesel or petrol powered plant in your house.
Mining with solar may also not be profitable in Nigeria. Are you mining as a solo miner or through a mining pool?
Bitcoin mining difficulty has reached a very high level to the extent that solo mining has become not profitable unless the solo miner is very lucky. Best to join a mining pool.
what is the cost of setting it up?
It depends.
If you want to know more about the cost, research more on:
- ASIC cost (go for better ones that is generating terahash up to 100
- Cost of electricity the miners you bought will be consuming per certain period of time
- Also you may need cooling machines
- Cost of electricity the cooling machines will be consuming per certain period of time
Know that ASIC are making noise. You may need sound proof materials. I think you should make more research on this.