Hey Michael,
A couple of things to add to Nimesh's replies:
One thing to bear in mind is that the you can export both the regular and "for export" vector tile services. The difference is that the "for export" vector tiles have a smaller (~15Mb vs ~90Mb) set of style resources that are downloaded. The difference is largely in the fonts that are downloaded.
"I just thought I'd check this forum to see if anyone else had done one" FWIW, I have in the past built various bare-bones apps with the Runtime SDK to generate and download VTPKs, but they've never been even close to polished. I've used those VTPKs in Pro to generate MMPKs for Runtime use, and have also side-loaded them for direct Runtime app use.
Hope that helps,
Nick.