If the design elements of the Speedvagen aren't important to you, fair enough. You can find a frame without them for less.

If we are going to talk about the validity of the cost, given the details that make a Speedvagen a Speedvagen, we have to compare apples to apples.

Go ask Mike D how much he would charge to build a speedvagen for you. He knows what goes into them and how long the build process takes, how much the proprietary pieces cost etc.