How to calculate returns from vegitable and fruit farming

Hi,

how to calculate returns from vegetable and fruit farming .I am totally new to farming ,Planning to do farming in durg district of chattisgargh after opting voluntary retirement .I have no idea about farming .I am mechanical Engineer by profession aged 50 years
I am planning for natural farming /integrated farming.
what should be the minimum acre needed
how about irrigation ,will ground water be sufficient ,rainfall is 900 mm,ground water level id 30 mm pre monsoon
how many bores are needed per acre or how many acres can be irrigated per acre.
how many cows are needed for natural farming per acre
how to calculate yield, cost of cultivation and returns from vegitables and fruits farming.
Please help.

Thanks!

I didn’t find the right solution from the Internet.

References:https://discuss.farmnest.com/t/how-to-calculate-returns-from-vegitable-and-fruit-farming/23198

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