If you can stomach a FC of 3-4km/L in the city and 6-7km/l on the highway, or if you can find one of those rare Super Safari 4.5L gasoline engined ones (these have a newer engine and are said to be effing fast) and still take the FC then go for it. I also saw a guy who LPG'd his gasoline Patrol; FC was the same but at least the fuel was cheaper. I'm likewise not sure on the availability of engine parts for the gas variants but i do assume Nissan should be stocking them.

Otherwise, the Pajero would be more practical to go with really if you want less headaches and don't have the time to bother on vehicle service too much.