I like Sams3D! They make the best houses and buildings (and everything else). I've tried building my own houses (in Ray Dream Studio 5.5 and Carrara) and it's a real pain. My real problem is with texturing them afterward because without the textures they just look like boxes. Sams3D has the most realistic looking models, they're very inexpensive, and they don't hog all the memory. (Another unpaid endorsement.)

Poser 2, 3, 4, 5, 6, 7, 8, 9, 10, Pro 2014, 11, 11 Pro