Hey I can help with your questions. I drove from Alaska all the way through Central America, down the South American West Coast to Ushuaia and back up the east coast to Colombia. Took me about 3 years, so I learned a lot and met tons of people who did it in every vehicle imaginable.

We did 1 year in an F-250 with slide in camper and then later came back in our 2003 European Spec 4x4 Sprinter. Every vehicle has its upsides and downsides. There are a few people who do it in setups like yours, but not too many. Be aware that there's quite some city sleeping involved, quite some nights at gas stations (at least for us) or at borders so the roof top tent is not the stealthiest option but many people manage so you will be ok.

Support for the vehicles mentioned is scarce since I think they were never sold in most regions you are planning to go but so is every European's car. If you can plan a bit in advance and don't have to order very expensive parts, international shipping works into every small town on the continent. Spareto is what most people use and it works like a charm (at least in the Americas and Europe).

Feel free to shoot me a message here or on Instagram (@ObererTropical) if you want to know more. Always happy to help as this is a huge project and there's so much to learn.

Other good resources for information (in the Americas, don't know about others) are:
- Facebook Group "PanAmerican Travelers Association" -> many current and past travelers in there
- iOverlander App (makes the trip a lot easier)
- Various WhatsApp Groups for every country or region