Post surgery she may be on a special diet. It's probably a good idea to check with her. But to your point about ordering from QVC and whatever it is not be too expensive, those two things do not go hand in hand. Shopping channel foods are pricey across the board. I've had the Grandma's coffee cake before. It was moist and flavorful. As to your question about shipping, it usually takes the normal processing time for immediate shipping, but there are sometimes options of choosing a future ship date (usually when the item is a TSV)
If you and she live close enough to one another, IMO it would be more meaningful if you could bring an appropriate lunch, or dinner, and visit a little while.
Good luck deciding and I hope yiur friend has a smooth recovery.