Checking back in here to let you all know what I found. I bought this fancy black box for $100 USD: (
Industrial USB 2.0 Over IP Network 4-Port Hub). It worked great for the Fluke 190 series II Scope, and also my el-cheapo Hantek 108 8-channel "scope." It also worked for Arduino, my camera, my Samsung Tablet, external HDDs, etc. The software is very intuitive and easy to use. I recommend you try this device first if you're looking for something similar, as you won't find anything more functional for less money.
The bad: It wouldn't connect to Omron PLC or Yaskawa VFD, which is a big deal for me. I am still looking for a product that meets ALL my needs. And when it doesn't like a device, it doesn't complain with a nice popup, it throws a wrench into your processor (BSOD). The other negative is minor for me, may be major for you; your PC's IP address must be in the same IP subnet as the USBNET device. If they aren't in the same subnet, the USBNET software will still recognize the device, but won't let you connect to it and use the attached USB devices.