The single burner propane stove is tall enough that stability is an issue IMO. Add a saucepan with a handle to it, use it inside the van and I'd have a recipe for disaster!
I picked up one of the single burner butane stoves for use inside the camper. At$15.00 it was a bargain IMO. Outside cooking I have a 2 burner propane camp stove but found it took up too much room on the kitchen counter to be practical.
I like the butane - yes it costs more in fuel than the 20 lb propane tank does BUT it's low to the counter so I don't feel I have a stability issue, it's small so it leaves me enough counter space for food prep etc.
The other thing I like about it is it's simmer capability. I can get it down low enough to simmer rice but it puts out enough heat on high to boil water quickly.
I also use a single burner alcohol stove which I have for backpacking/canoe trips but it really doesn't fit with my regular pots and fry pan and I don't want to use my good lightweight Trangia pots for every day use.