Mining 101 -- I'd like to fill in the huge gaps of understanding I have with the mining side of p2p cash .

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1. Dumb question I know, but what current incentives keeps BCH miners mining BCH instead of BTC? The rewards are the same in newly mined coins. 3.125 BTC/BCH. But in dollars, 3.125 BTC can be sold for more Fiat than BCH.
2. Are there any home miners mining BCH on rigs in their home? Do they no longer exist? Did they ever exist, or had all the mining moved to mining companies before the Fork in 2017.
   
3. Is there a way to see live where (physically on like a map) each block is mined?
4. Is there a way to incentivize more home mining rigs