The Razor Dune Buggy conveniently solves this little dilemma.

So you want to tear up the dunes with your own dune buggy but you're not sure whether to buy a complete turn key buggy or use some dune buggy plans to build your own? Before you decide which route to take, well firstly there are a number of issues you need to address. The main factor that people consider when deciding to buy/build a dune buggy is the cost of the project, how much is it going to cost me if i decide to buy one Vs.