Great idea, web site looks very good, niche yes, but at least you are having a go. No use wondering about it! You certainly both have the credentials! A couple of years ago I took my daughters down South and rented a camper van and did a lap of the West coast/Eastern side of the Southern alps. Came back and suggested we could do a similar thing, but NZ based. Arrange appropriate vehicles, organise 'off the beaten track' tours etc. Seemed like a good idea at the time! We've had a few RTW people come and stay here over the last couple of years. Quiet place to camp, workshop facilities etc. When I met John in January in Wellington he suggested I should set up a website and offer a NZ 'base' for travelers. Maybe I could work as your NZ fixer!
Oh, and I won't lie. I did have to look up Benthic Taxonomist!