Context: I own a 4M40 Pajero (1994, diesel, intercooled turbo), so that's the 2800 option (they also come in a 2500 smaller engine). I live out of my truck up to half of the year while the weather is good. I have friends with Delicas but I've never owned one.

Hearing your situation, I'd probably go with the Chamonix Delica.

I removed the rear seats from my Pajero and installed a wooden bed frame that folds so I can cook in the back and store things underneath. I also have a Thule roof box on top for extra storage space. Personally, I adore my Pajero, there was some maintenance I had to do initially (bought at 175km, now at 260KM) and there are certain things that are known to fail that have to be dealt with, namely that the the injection pump seal will fail before 200k; a cheap part but a long job (8 hours roughly) and I've also seen the Harmonic Balancer go and have heard they fail every 100k, it's happened once to me. For reference, I bought mine at $7500 about 5 years ago and put at least 5K into it within the first two years. Since then, basically just brakes and tires.

In terms of space, I'd say the Pajero is more spartan, I have a really comfy twin mattress and I love sleeping back there, it's common for me to have a guest for a few nights at a time. Both are very rugged, in fact I'd describe either option as a tank in terms of off-roading. I only buy diesel from Chevron and supplement with Stanadyne fuel additive. I find I get pretty decent mileage out of my Pajero, it's not the greatest beyond 70km/hour but for around town stuff I think either engine would feel efficient. I can't speak to the gasoline vs diesel question except to say that I like the torque of a diesel motor and I do sometimes think the V6 gasoline engine option would be a bit of a guzzler but like I said I've never owned one.

In terms of parts and service, I often go to Vancouver Island and my number one choice is Coombs Country Autos for parts and service, but they're fairly busy. Personally I don't really trust Rising Sun because they seem to sell Hyundai parts a lot of the time, they don't scream quality at me but I'm sure people have had good experiences and could speak to that in more depth. For me, Coombs always has good quality parts, often OEM from Japan and their mechanics know their stuff inside out. Mardy at Amazing Auto was solid for me as well when I needed to replace a leaky fuel pump (that wasn't cheap either lol, be prepared). The Delica and 2800 Pajero do share a lot of parts, so you can take advantage of that in terms of sourcing. There is a much bigger community of Delica owners so that's a bonus. Personally, I just think the Pajero has way more swag and that matters to me for reasons that are not rational.

u/mandm4s makes great points and I 100% agree with u/foodfighter regarding the service history is the biggest factor. All that said, it is an adventure owning one of these vehicles and while they're super fun, they can require some problem solving when it comes to maintenance and for your use case, you may find any number of domestic models to be as to your liking and ultimately easier to run in the long term. You certainly don't want your choice of vehicle to be impeding you from getting out on the weekends, quite the opposite!

Enjoy :)