Apple does not respond in these forums except occasionally an Apple employee will stop by. If you want to contact Apple, use the contact us link at the bottom of this page.
With respect to your question "When will Windows 8.1 be supported on Boot camp 5?" you are asking us to speculate as to when Apple will release their drivers supporting Windows 8.1. We do not know, and we can not speculate as to when. From the terms of use of this forum:
"Unless otherwise noted, do not add Submissions about nontechnical topics, including:
Speculations or rumors about unannounced products."
The planned dates of production or release of Windows 8.1 drivers are speculation about the drivers.
With respect to your other question, "Do I return the Windows version and try to download 8.0, or wait it out until it is supported? New to Mac's.". I answered you.