Typically I'd suggest to DIY the second wheelset on any bike but with a fatbike I will admit that it's a bit of a pita. Especially if you don't have experience with wheelbuilding. I'm right now considering whether I should let my local wheelbuilder build me a new set of touring wheels or get a new truing stand with thru axle compatability. It'd be a lot cheaper to let the wheelbuilder build the wheels initially, but in the long run I'd save money.