Get a GOOD 4-sided spoke wrench. IMO the Park SW-20 (the big silver one with butterfly wings) is well-worth the cost if you're building your own wheels. You don't need a tension meter (for most builds), or even a truing stand or dishing tool, but you NEED a good spoke wrench.

And FWIW, use an RR415 on your front wheel instead of an RR465. At 28h, that'll be plenty strong, especially if a 28h rear wheel is strong enough. And the RR415 is a lot lighter.