If you're not a high-end videogamer who needs a hot $4k PC, and who only does about one Vue final-render a week, then the Pixelplow online renderfarm is probably the way to go. That would ding your wallet for a mere $60 a year, or thereabouts. Easy and cheap to test it, too, to see if it can do what you want. So far as I know, they're the only farm who accepts Vue files, and perhaps their Vue service may not last forever.

On your specific question on the onboard graphics, my Vue 2016 R2 xStream does fine with onboard graphics, though the preview window is small and sees a lot of features being turned off as the scene complexity increases.

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