re: brew Quaker Oats once with Fleishmann's dry yeast and I got sick as a dog.
Dear Lord! What did you expect?
re: When they say "retooling" it means they are sterilizing the vats for the next batch for the next round of fermentation which then takes weeks.
No, it takes "days", at the most to prepare for the next batch of wort. It does take weeks to complete the fermentation process. I have been an active homebrewer since the mid-80's. I don't know this firm (and have no opinion on it's prospects), but I do know the brewing process.