As TonyDtorch stated, YouTube has TONS of awesome information about van conversions. There are a lot of videos that explain the lifestyle, pros and cons, and general information about stealth camping (parking lots, how to find toilets, etc.). There are also a ton of videos explaining in great detail how to convert your van, everything from flooring and insulation to solar-powered electricity and running water.
This guy has an excellent series that goes into exceptional detail for conversion: youtube - watch?v=ukZmSwmZ9Hk (I think it wouldnt let me post a link, so put that at the end of the Youtube URL)
Best of luck! I would love to have a "mini house" as a home base and live part time in that (it's always nice to have a real bed and a shower to use, ha!) and travel most of the time in one of these van conversions. If I had the extra pocket change right now, I'd pay someone to custom create this, as I don't have the time, tools, nor a place to do it myself (apartment complex) but where there's a will, there's a way and it's going to happen, dang it!
Regards!
Bob