>>3172538The 85, because fuck manual focusing. If you wanted f1.4, pick up a 50 1.4D for about 250. The 85 is pretty much perfect for indoor sports, and headshot portraiture.
>>3172554>>3172473See if she'll spot you money for rentals. Do a weekend (if possible, it's cheaper) rental for a 17-55/2.8 or 16-80/2.8-4, a SB910 or SB5000, maybe some other accessories. If you've got the money to spare, and the arms and shoulders for it, grab a 70-200/2.8 too.
Then follow
>>3172649 this idea, and start planning.
>>3172475The Nikons are fairly bollocks at video, the D7100 especially so. Rolling shutter out the ass. Stick with any of the IBIS mirrorless cameras for video. Decent value for the package.
>>3172422Flexibility in one package, or two? Some prefer just having one lens, others prefer having the option of moving to the f2.8 lens. It also depends on how well the 2x works with the 70-200. A 70-200/2.8E with TC20EIII performs about as well, if not better, than a 80-400G VR at 400. It's a pricier package, but now you've got a very sharp 70-200/2.8, and a pretty damn good 140-400/5.6.
>>3172329The grass is greener on the other side of the fence. It doesn't matter if you've got a pinhole camera or a $10000 camera system, the important thing is maximizing YOUR potential.