Seems like the only real approach, after you've ruled out the obviously unworkable cases, is to pull the trigger, see how it performs, and make adjustments. Whether or not the adjustments involve selling and buying something else depend partly, but not entirely, on the research. Either way you will be making adjustments. I guess that is maybe the most important part of it when going into something like this jointly. Moderate expectations up front and see what you can live with.
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Maybe I can do this in two campers because I probably don't have time (and I know I don't have money) for five and I don't want to move again.
On these big purchase decisions my MO is always, "know thyself"....It isn't my first choice but it might be a way to skip a step of buy, sell, buy. But, if it isn't pretty close to what I'd actually buy I'm not sure it would help me,
We're fussy so that doesn't help the buying part. Plus I tend to carp about stuff after and the Good Wife hates that... so a lot of things we just don't do, or we do them ourselves which takes forever...
Seems like you're pretty realistic about things and giving this some careful consideration. Good news is both units are pre covid builds and both marques have solid reps. Will say I'm partial to the NL. That's partly Homeboy stuff but also I see quite a few around (again, in BC).
Thing is, I don't think you're going to be able to tune the rig like a sports car. Campers will impose limits. Most owners will just accept them because of the $s and effort. If you want to mod that's fine, of course. I just see the camper part being the core raison d'être and so one puts up with (some of) the rest.
@simple brings up a great point re storage. If you don't have a spot, campers - and other RVs can be a giant PITA around the home.