Well it sounds like a good plan. The getting out part and all.
The problem is that the getting out part is the easy one. The real issue is why we have this code in the first place.
The reason for the 44 inch sill heights and 5.7sq ft window opening is so the fireman coming into the house to save your passed out ,smoke filled lifeless body...and can get you out.
But first they have to get in with their gear, this includes air-packs and tanks for older departments with limited funding.
Your Idea will work to get out, but I always lean to where I will be after the fire ......and what happened and if it is to late for someone in my family.
Good luck in your decision.