Around that budget, 4x2 talaga. Besides, yong 4x4 straight from the dealership started yata around 2004 or 2005, so definitely around 1M up pa. Also, masyado yatang malakas sa gas yong gas variant for that year range model. Yong bagong Safari Series, ok na yong Gas, i heard. So for around 2002 model, mas ok diesel.
Okay naman ang 4x2 pag kapos ang budget, lalo na pag metro manila lang mostly ikot mo. Syempre, wag mo lang dalhin sa mga pang-4x4 na location.
You should be careful of the Nissan patrol. Make sure there is no blinking orange light something like a check engine. A Nissan Patrol having that mileage is prone to have problems with the pump and injectors. Of course, It can be fixed, but I think only 3-4 places can do it properly.