Others may laugh, but the stove I'd reach for in that situation is my old Coleman single-burner propane stove.

It's hot, quick to light and relight, and so simple that anyone could use it.

The fuel lasts more-or-less forever, as far as I can tell. It's easy to visually inspect the seal to guard against leaks.

I also have an adapter so I could use my 20lb BBQ tanks if I needed to.

As to indoor use: any camp stove is tricky in that situation; carbon monoxide and fuel leaks can ruin your entire day. I prefer to use it in my porch or carport, never blocking emergency exits, and with fire extinguishers at the ready. But I'm a lot more comfortable with the old Coleman than a liquid-fuel stove.

My $0.02.