You should almost (never) need a flash for something stationary.
i.e. real estate, architecture
Most real estate photos aren't printed beyond 4x6 so 6.1MP is more than enough. Online, it's even less.
If the object is inanimate and not moving, you shouldn't use a flash. If you can't hand-hold due to the lack of light, get a tripod or a monopod. I picked up an excellent monopod from FactoryDirect for $20.
My real estate photography work was with www.advirtours.com