RE: top to bottom help needed
From reading your question I can tell you have not look much in depth to crawling vehicles. Much info can be found with a search. There is no such thing as an easy build and there are really no RTR cralerws out there with out paying a price for a custom chassis to be assembled and shipped.
[link=http://www.thecrawlerstore.com/complete_trucks.htm]The Crawler Store[/link] offers RTR packages, but the prices are high. Crawling is a fairly new RC sport and requires a little know how and enginuity to get into. There are other forums on the net to, like RCC, if you search for them. I love RCU but it is lacking thus far on the crawler information end of things.