Pickup a good quality RKR, modify it to how you want it (comfort additions etc) and spend the remaining budget on family.
RKR demands certain modifications:
1. "Kamani" is a comfort issue. The passengers in rear will have bump rides throughout. Good quality shock absorbers may work.
2. The original engine 3F , 4000CC petrol gives 3-4 Litres/Km.The diesel engine 2H , 4000CC is no better in fuel economy.
a. Other options in market are 3500CC diesel, which was used in Coasters (bus) in 1980's and 90's.
b. Then a lot of others like 2400 CC diesel, used in Surf and is an engine full of problems.
c. The 4200CC (including multivalve) which is used in 80 and 100 series Land cruiser (1991-2008). It gives 7-8 Km/L.
The best option is 1KZ or 1KZ-T. Its 3000cc, 4 cylinder diesel. Rest are V-6, even diesel. This used in Prado, Surf and TLC.
3. The interior is very old, so may need upgrading such as replacing with 1990's Prado, which looks somewhat modern and curvy than box-type interior of RKR.
The best thing about RKR is its acceleration due to its weight and small size (3 door). And then its off-roading including road-clearance. Diesel mechanics are everywhere in Pakistan and parts are easily found. A lot of goodies can be added on it like lights, bars, winch etc.
The RKR will go anywhere in Pakistan.