Thanks all for your thoughts and perspectives.
Random factoids somewhat relevant to some of what was discussed above: under the current books:
Sunday Vespers takes 45 minutes, without kathisma psalms or (when appropriate) readings (1 hour with psalms)
Orthros takes 1.25 hours without kathisma psalms and with only the katavasiae sung without the canon (and without super-elaborate musical settings).
Full sunday canon took 45 minutes the one time I've been through it
Add in kathisma is about half an hour, based on my recollection of a monastery visit.
So, "full" Orthros will be about 2.5 hours, meaning that it should start at 8:30 in the morning, or that a "vigil" should be from 2-3.5 hours, using the shortcuts described above (5-8:30, 6-9:30 or 7-10:30).
Quite frankly, that's a lot. I admire parishes that make the effort, but I can understand why someone may want to shorten things. From a musical perspective, I think you'd need at least 2-3 experienced chanters who could sing the services themselves, as well as a number of less trained assistants. Not impossible, but still demanding.