Re:Beginning this journey...advice and guidance needed
Welcome! Since you've been on here a while, I hope you've found all the forums and posts on here related to van conversions. That's the best place to start. Read them all!
Give us an idea of what you're planning to sell, the type of food, the extent of the menu etc. Different foods/menus require different build outs, different plumbing, electrical etc. The more info you give us the more we can help you!
Be specific as possible.