So, just to follow up...
Not sure how useful this information is to most on this board, but I do appreciate the responses for sure.
I ended up using this technique to make two starters for two beers:
I made a 10 liter starter on the stove with about 2.75# extract. Cooled, poured through funnel into 10 liter Pyrex "jug".
Pitched 4 White Labs vials (one of 029, the next one of 002), put it on the stir plate.
From the 12th hour, for the next 8 hours or so, I hit it with Pure O2 through a diffusion stone for about 30 seconds, or until it foamed up too high. (this while it was still spinning on my stir plate).
On the third day, the yeast was done, I crashed it out in my cold room, then on brew day (the next day in one case and 4 days later in the other), I syphoned off the spent wort/beer down to about the 1500-2000 mL level.
I swirled up everything under that level, and pitched into my awaiting 53 gallons at 1.054 and 51 gallons at 1.055 awaiting worts.
Both had no problem getting right to work - the Kolsch took it down to 1.010, the 002 finished out in just 3.5 days to 1.014.
So, the answer to the question, will this work, is Hell Ya.