I wish I could go all summer on a small green bottle, and wish they were two-fiddy.
I do a lot of pressure cooking so need to simmer 20-30 mins, or ten if no rice. I cook breakfast including an iron skillet and a pot for water.
I have used the green bottle with a stove on top of the bottle, but I do go through them and a wok is difficult and I have come close to losing smaller pots and pans. A few campers ago I had the Coleman two burner with a green bottle, but sold it with camper as I had it customized for that stove. Biggest part was having to assemble the bottle on the stove every time.
I sometimes carry the bottle top stove as a back up.
I like the idea of using a 2-burner RV stove and building it in a small tray of sorts on a hose or quick disconnect so i can cook inside or out on this. I have seen some on ebay for $65, so not cheap, but cheap enough