I'm switching to the Scott Hargis style lighting for my real estate clients. I've shot interiors in the past using studio strobes and umbrellas etc. and will continue to do that when appropriate, but I want to know the best off camera flash set up for working quickly. I'm thinking one in the left hand on a monopod and one or two somewhere else in larger spaces.
I was looking at the Yongnuo brand which I'm thinking is a good bet for real estate (especially after having one, and then a second, expensive Nikon SB900's knocked over and destroyed in the past year). I've heard the Yongnuos are cheap and perfect for real estate.
Yes, many real estate photographers use the Yongnuo YN560 flashes. The latest version is the YN560 IV ($65 USD). If you get a companion YN560-TX ($37 USD) and put it in the hot shoe of your camera, it will trigger all your YN560s and even let you control the power of each flash.
Many real estate photographers use the flash on a monopod approach - also referred to as "flash on a stick".