These are legit concerns. However, IMO the flaw in your planning is to be found in a previous comment, in which you said:
In short, attempts at weight loss should initiate with diet modification, not increased output. The plan you are contemplating seems like a recipe for frustration and stalled progress. Shelve the overly-aggressive cardio program for now, and tighten up your diet. If/when weight loss stalls, cardio can be added slowly and incrementally as needed to get the needle moving again.