MilwDave Is probly right
but I think it depends on your goals. The Roctane comes with 21/18 wheels but if you want a wide rear tire you CAN'T fit a 240wide on a 5.5" wide rim. And the roctane is not spoked so no rebuild.
It comes down to budget I think
Wheel building is a skilled thing requiring some special tools. (NOT A plug) some experience is required to do it properly. I posted the Sources for the parts and am not familiar with anyone else making them. The R18 is a small market for custom parts and mostly from Germany.
This being said...
Yes those are the prices. You don't necessarily have to ship your hubs over there. You can order the parts and have it built in the USA too. Where are you located?
I did the build (lacing, trueing, sealing ) of the wheels myself.
#shamelessPlug