I have been shooting real estate in North Carolina for 8 years. I have just under 1,000 homes under my belt and for much of that time I have used a succession of Fuji cameras: X-T1, X-T2 and currently X-H1 always with the excellent 10-24mm lens. There is no real advantage to full frame as most images either hit the net on realtor websites. In my case those images that go for print are supplied as TIFF files with a substantial amount of information on them. Those unenlightened people specifying full frame for real estate work have a poor understanding or of the quality images that can come from a CMOS sensor.