What tires are you running?
Good carbon rims (in your price range) are in the neighborhood of $500. Nox, Derby, We Are One, Ibis, Nobl, Raceface (?).
Hubs I like: White Industries, i9 Hydra's, Project 321, Onyx, etc. Industry Nine has made a seriously impressive hub set that's super high engagement, apparently quite durable, light, dead simple to work on and requires no special tools, and has major bling factor. Pretty sweet combo. Though White industries gets my vote for best value Made in the USA hub. Titanium freehub, great bearings, decent engagement (48), Bling, and reasonably priced.
That leaves room in your budget for Sapim Laser spokes. Light, strong, only like $1.20 each. Labor- $100-150 for the pair. Don't forget to use Brass nipples, much more corrosion resistant on a carbon tubeless wheel.
Depending on if you value durability or light weight there's plenty of good rim options out there. You have a solid budget. Find a builder you trust and build your dream wheelset.
(there's also lots of complete wheelset options in your price range)