If i was to design a Offroader for myself i would first of all look in to the widely available chassis in market. Cj or Fj.
Than i will rely on toyota parts like axles tubes,engine petrol or diesel, dash etc..
As these parts are widely available in pak are reliable and wont cost that much too.
The Key is making a offroader under million ruppees with the luxury and proformance of of a hilux atleast.
The original panels of cj or fj should be fabricated and given a bit of modern touch.
Hood, doors and top should be made from fiber glass. They are not that expensive after the mold has been made.
Engine should be atleast 3 liters.
Atleast 5 door as bigger is better in pakistan.
Power steering, power windows, ac/heater and winch should be a must.
I would stay aways from all the technical stuff as it would add to the cost and reliabilty would be at stakes as genuine is genuine. Not many mechanics understand all that stuff.