Sargodha, it is a nice place I think Pakistan Airforce has a big base there, I have visited it a few times, the people are nice, I am from a village a few hours by bus on the road to Rawalpindi. I think most people on this GS website may not be the right people to get advice from since they are not from that area.
I spent my first 20 years especially summer vacations from schools in cities going back to my village without electricity and running water, we use to draw water from a 90 ft deep well with muscle power. it is a lot of work to get water especially for the big Bhains (water Buffalo) and tending to the farm animals.
I remember every evening cleaning the glass of the kerosene lantern (laltain) so we could have light.
My personal opinion you will like it and your children will benefit too from the simple life, there is no harm in trying it for a while, you always have the choice to come back.
Also the most benefit to your children will be the time they spend with their Grand Parents.
I would not trade the time I spent with mine for any luxury in this World. it was priceless
my guess is with one or two kila land that is irrigated you should atleast make 4 lakh Ruppes/kila if not more per year.
and there is this website for the farming community tells you all about different crops and the market rates for the produce: