Truing a newly built wheel is very frustrating. If you choose the DIY route, prepare for the frustration. OTOH, my tolerance is pretty low, and I'm still riding the wheel I built in 1981. (I'd be riding 2 of my wheels, except I crashed and pretzeled the front one in '84.) The frustration was overwhelming as I went through it, but it was temporary. It just didn't feel temporary during the build. :-)

If you DIY, I recommend having a pro tweak it after you think you've got it right. Just don't tell 'em that you built the wheel, because, if you do, they'll probably tell you they have to rebuild it from scratch....