It's hard to recommend against the D5300, but the D5200 still has the anti-moire filter. If I were you, I would still get the D5300, but with a return guarantee. Take it home and shoot patterns: tight checks, houndstooth, close-ups of the weave, and look at them at your posting resolution. If you see weird patterns or color shifts, you've got a problem. Return that camera then and get a D5200, or if you're not wedded to Nikon, a Canon T5i.
I'm not advocating against Nikon. I use them and prefer them, but I'd hate to see you find the one Achilles heel of this camera. I don't know that it will be an issue for you, but Nikon was initially very concerned about this move, and cautioned fashion photographers explicitly. A quick software fix can usually take out the moire, but with 2500+ images a week, that could still add a big time drain for you.
I'm off now for a (hopefully) epic thrift spree, but I'll check back in on this thread later.