As for time I figured you would run the sequence over and over. I understand you wouldn't be able to make a lot but maybe enough for a small sauce. Your point on exhaust is a valid one. I hadn't thought of that. On the same note, what foes rotovaping do differently than say a rapid infusion with the isi whipper using a high proof such as everclear. Seems like you could get the same product or at least a usable one without dropping 6k. The infusion should work well especially if you let it set for a day before charging and releasing the no2. You could also sousvide the infusion at a low temp for a day without oxidizing it to further the infusion I would think. Then process with rapid infusion should produce a very adequate product in less than a day?