I want to start up a new company....

That sounds like some good ideas. You will have some competition for sure. Old range rovers and land rovers are super hot right now. Finding solid build or salvageable candidates is getting harder everyday. And they are not cheap unless your lucky and find someone who doesn't know what they have. But solid custom decked out trucks with heavy axles , transfer cases , transmissions and strong engines along with over built suspensions and solid straight body work can fetch into several hundreds of thousand of dollars . So the potential for large profits is there if you can keep your build costs in line. Good luck with your ideas.

I love old 4X4' s old Broncos, Scouts, Blazers, Power Wagons, Uni-mogs , Range rover, Land rovers, etc, etc. The market is really hot for all of those right now and hard to find a decent restoration or rebuild for less than $100,000 .

I personally know a guy that has an 89 FJ-40 that he has over $300,000 US in it. He shipped it to Brazil from the USA had it built with a 2018 Hi- Lux frame , suspension and drive line under it. Arrow strait and solid body work, custom interior including air conditioning and shipped back . It took them 13 months to complete the build .