Welcome to a great forum.
What vehicle & layout are you planning?
I am 61 and been working on my project now for 27 months. It's about to leave LA for Eagle Motors, New Zealand in a 40ft Seacontainer(picture in my gallery) and be
converted to RHD/right hand drive and to comply with Australian ADR/Australian Design Rules. All vehicles under 15 years have to be converted to RHD, to get licensed by our Federal & State Governments.
Best Wishes with your build.
Do as much research as you can, inspect other similar vehiles, go to events with similar vehicles, visit other owners with vans like your build.
2008 Yellow Ford E350 6.0 diesel eb50 4x4, Front E Locker, Asheville Eng Rebuil 20th @ 261miles, ARP Studds, 200amp Alternator, Performance Aluminium Radiator, OnBoardAir, RoadmasterActiveSuspension, Front & Rear Aluminess with Spare Tire Carrier, Aluminess Roof Rack, Titan Aft 30gallon Fuel Tank.