I know huge capital is required to meet up huge financial expectations, what's the minimum volume of income one can use to start mining? In a situations where you trade with different strategies and still hits wrong targets, if you apply or use same trading knowledge for mining won't one still loss in mining too? Because I don't have enough money with me, so am trying to cut losses if mining too will not favor me I will decided to venture into mining too again.
Can I start mining with $300 and grow from there?
If you mean bitcoin mining you want to mine, at this time I don't know any 300$ Asic miner, most of them are expensive in the market. Try to see it here at
https://www.canaan.io/ and also try to research if you are really determined to buy.
Even if it's a secondhand Asic miner, you can't buy that amount of 300$, instead of thinking about that, it's better to buy bitcoin or other altcoins that have the potential to give you profit.