We've got a residential oven, though it's a 24" apartment sized range, not a 30" range. We use it every day for an average of 2 meals daily and we go through about a bbq-sized propane bottle every 4-6 weeks. We mostly use the cooktop burners but do some broiling, baking or pizza making once or twice a week.
I wouldn't be happy with a small RV oven, and a standard 30" range would be overkill for us. An apartment size range is a nice compromise. I say go for it if you plan on doing any baking. I'd guess that the top burners would use just as much gas whether it's an RV stove or a residential range.